chem12.17 Flashcards
Protein soluble in water
albumin
What diff proteins from carb/lipid
nitrogen
conjugated protein
protein plus prosthetic grplipo, glyco/muco, nucleo
5 plasma proteins
albumin, alpha 1, alpha 2, beta, gamma
Primary protein structure
amino acids
Secondary protein structure
alpha helix, beta pleated sheets
Tertiary protein structure
3D
Quaternary protein structure
2+ polypeptide chains
Enzyme deficiency with decreased enzymes leading to buildup of ketoacids decreased branched-chain ketoacid dehydrogenase enzyme activity(LIV)
maple syrup disease
Aminoacidpathy caused by defiency in the enzyme to metabolize phenylalaninemousy urine
Phenylketonuria, PKU
Aminoacidopathy due to enzyme deficiency due to lack of enzyme to break down tyrosine/phenylalanine leading to buildup of homogentistic aciddeficiency of a single enzyme called homogentisate 1,2 dioxygenaseblack urine
Alkaptonuria
CystinuriaTyrosinemia
inherited metabolic,excessive amount of undissolved cysteine, doesn’t get reabsorbed by kidney, kidney stonesTyrosine/metabolites excreted in urine
Deficiency in enzyme needed to metabolize methionine Increased levels of this amino causes stroke, CVD, alzheimers, osteoporesis, nutrional def
Homocystinuriabuild up of methionine and homocysteine (metabolite of methionine)
4 causes of hypoproteinemia
Not getting/making enough:malnutritionliver disease(doesn’t make protein)Protein loss: burns(protein loss thru wound)nephrotic syndrome(loss thru urine)
3 Causes of hyperproteinemia
dehydrationMultiple myeloma, Waldenstroms
5 immunoglobulin
G,A,M,E,D
4 measurements of TPTP g/dL
BiuretDye bindingKjeldahlRefractometryTP 6.4-8.3 g/dL
TP g/dLalbumin g/dLmicroalbumin in urine mg/24hr
TP 6.4-8.3g/dLAlbumin 3.5-5 g/dL (about 60% of TP) rest is globulinsmicroalbumin 50-200 mg/24hr
Calculation of A/G ratio
Albumin/TP-albumin
Total protein method that reacts with >= 2 peptide bonds in proteins
Biuret
Biuret reaction for TP uses…which forms what color complex
copper salts which forms a purple color
4 dyes in dye binding for TP
Bromophenol Blue Coomassie brilliant bluePonceau SAmido black
Reference method for TP, not used often
Kjeldahl
TP method that measures nitrogen
Kjeldahl
This reaction follows Beers law for a reasonable range of proteinDepends on presence of at least two peptide linkagesIs insensitive to low protein in urine
Biuret reaction
3 things that can interfere with Biuret method for TP
hemoglobin, hemolysis and lipids can interfere
Two dyes used in dye binding method for albumin
BCPBCGBromcresol
BCP/BCG is used in what method…are used to determine…
Dye-binding methodfor albumin
Principle of protein measurement calledpHcolor change from,tofalse pos seen in what pH
protein error of indicatorspH 3.0yellow to greenalkaline urine
Breakdown of protein in liver produces…and also produces…
ureaammonia
B2 microgobulin used as a marker for
marker for reduced GFR
CSF protein
15-45mg/dL
3 Methods for Urine/CSF protein, BAD acronym
BiuretAcid: SSA precipitationDye: Coomassie brillant blue
Increased CSF protein in these 3
meningitis, tramatic tap, MS
Protein in Spina bifida
AFPalpha fetoprotein
CEA stands for, is a
carcino-embryonic antigenoncofetal antigen
CEA nonspecific for
colorectal carcinoma/colon cancer
AFP
alpha fetoproteintumor associated; secreted by fetal liver
Increased AFP 4 conditions
liver/heptocellular cancerneural tube defects(spina bifida)ovariantesticular cancer
Decreased AFP in
Down syndrome
HCGMade by…Has…
human chorionic gonadotropinmade by placenta after implantation by trophoblastic cellsalpha+beta subunits
HCG seen in these two cancers
ovariantesticular
PSAMade by…Seen in..
prostate specific antigenmade by prostatic epi cellsprostatic cancer
CA-125
ovarian cancer
CA19-9
pancreaticGI, adenocarcinoma
CA15-3, 27.29
mestatic breast
Two markers in breast cancer
CA27-29, CA15-3
Thyroglobulin marker for
thyroid
All proteins carry a net…charge due to protein being a higher pH than its isoelectric pointand travel towards
net negative, anode
Fastest/smallest protein toward anode
albumin
Which globulin migrates to cathode due to electroendosmosis
gamma
pH of electrophoresis
8.6
Anode
positively charged electrode
Cathode
negatively charged electrode
Protein in highest concentration and made in liver% of plasma protein
Albumin60%
Method of detection for albumin and reagents used
dye binding, methyl orange, bromcresol purple
Albumin function
transport/binds proteinosmotic pressure
Albumin decreased in these 3 things
malnutritionliver diseasenephrotic syndrome/renal loss/kidney disease
Albumin increased in this
dehydration
Another name for prealbumin and used to assess…
trans-thy-retinnutrional status
Liver makes these 4 globulins and RE/plasma cells make this
liver: albumin, alpha 1/2, betaRE/plasma: gamma
two alpha 1 globulins
AAT: alpha1 antitrypsininhibits the neutrophil elastase activity in the lung and hence can protect it from proteolytic damage.AFP: alpha fetoprotein
AAT increased, decreased in
increased in acute phase/prego(Action of Neutrophils cause AAT to try to keep it from damaging tissue)decreased in emphysema(Def means neutrophil byproducts are damaging tissue)
AFP increased, decreased in
increased in neural tube defects liver cancerovarian/testiculardecreased in Downs
Globulin increased in acute inflamation
alpha 2
Large globulin made in liver, inhibits trypsin/pepsin/plasminincreased in pregonephrotic/kindey disease diabetes, lupus
alpha 2 macroglobulin
three alpha 2 globulins
alpha 2 macroglobulinHaptoglobinceruplasmin
Alpha 2 globulin made in liveracute phase reactant that binds hmg
Haptoglobin
haptoglobin increased/decreased in these two
increased in acute phases, nephrotic syndrome(Increased α2-macroglobulin is seen in nephrotic syndrome due to increased synthesis and inability to pass through the glomerulus)decreased in transfusion, hemolysis
Alpha2 globulin transports copper, made in liver, acute phase reactant
Ceruloplasmin
Disease with decreased serum ceruloplasmin and increased serum/urine copper. Increased storage of copper in organs/cornea
wilsons
Disease with decreased ceruloplasmin due to decreased absorption, decreased serum copper
Menkes
Ceruplasmin is a …. that transports…increased in these two…decreased in these two conditions…
glycoprotein that transports copperincreased in acute phase/inflammation, pregodecreased in Wilsons disease and Menkes
Type of globulin that is carrier protein for iron and lipidselevated in
Beta globulinincreased LDLIDA
Beta globulins examples
Beta2 microglobulinbeta lipoprotein/LDLtransferrinhemoplexincomplementfibrinogenCRP
Beta globulin that is a heme scavenger
hemopexin
Beta globulin that transports iron
transferrin
examples of glycoproteins
transferrinceruloplasminmucinsAFPimmunoglobulins, antibodiesFSH, LH, HCG, TSHFibrinogen
A non-glycoprotein that are temp sensitive proteins that precipitate from serum/plasma at temps lower than 37C
Cryoglobulin
Striated muscle/cardiac; increased in heart attack, muscle dystrophy, crush
myoglobin
complex of 3 proteins in striated/cardiac; muscle contration, most sensitive for heart attach3 subunits
TroponinTnI, TnT, TnC
Bence Jones in urine migrate to..Prealbumin band seen in…
BJ to gamma regionPrealbumin in CSFUrine/CSF concentration first
globulin increased globulin decreased in viral hepatitis
gamma increasedalbumin decreased
globulins increasedglobulin decreased in maligment tumor
alpha 1/2 increasedalbumin decreased
beta-gamma bridge/broad gamma seen in
active cirrhosis/liver
M spike seen in
Monoclonal gammopathy
increased alpha 2/gamma ratio seen in
nephrotic syndromeliver makes less albumin
Migration of globulins from anode to cathode
albumin, alpha 1, alpha 2, beta, gamma
Polar hydrophillic and nonpoloar hydrophobic fatty acid chains; cell membranes are made of these
phospholipids
Examples of phospholipids
lecithinsphingomyelinPG(phosphatidyl glycerol)
Long chain polyunsaturated fatty acids that activates inflammation Stimultes clotting; also stimulates cervix to dialate and contractions
PGProstaglandins
Transports lipids, classified w/ultracentrifugationProtein part of lipoproteins/structural components
transports lipids: lipoproteinsProtein part: Apoprotein
Order of lipids from heaviest to lighest
HDL, LDL, VLDL, Chylo
Alpha lipoprotein is…Beta lipoprotein is…Prebeta lipoprotein is…Migration of liproteins from origin/cathode to anode
alpha: HDLBeta: LDLPreBeta: VLDLOrigin to Anode:Chylo, LDL, VLDL, HDL
Largest lipoprotein, carrier of exo TrigApoproteins associated with it
ChylomicronApoB-48
Exogenous/dietary lipids and it’s liproprotein/carrier
Triglycerideschylomicrons
most artherogenic lipid causing CHD, mostly composed of cholesterol and transported to the heart
LDL
Endogenous lipid made of mostly triglycerides
VLDL
Lipid transports lipid out to liver, heaviest and smallest
HDL
primary form of lipid storage…transported by these two…
triglyceridesexo/dietary: chylomicronsendo:VLDL
Lipid made monstly in liver, manufacture/repair cell membranes, makes biles salts/vitD, precurosr to steroids….two kinds:transports to cells…transports out of cells…
cholesterolto: LDLout of: HDL
% of Cholesterol made in liver…% of Trig made in liver versus diet…
Cholesterol 85%Trig 10% liver, 90 diet
Apoprotein B-100 are part of these two lipids
LDL, VLDL
Apoprotein A is part of this lipoprotein
HDL
Apoprotein B-48 is part of this lipoprotein
Chylo
LDL % carrries lipids
60-70
HDL % carries lipid
20-35
VLDL % carries lipid
5-12%
Major protein in HDL
Apolipoprotein A
Major protein in LDL/VLDL
Apolipoprotein B
Protein versus lipid density
protein more dense than lipid
Disease with very low HDL
Tangier
Method for cholesterolpurpose of saponification step
cholesterol oxidaseconvert cholesterol esters to free cholesterol
Liebermann Burchard reaction used to determine
cholesterol
2 reagents used for color developemnt in Liebermann Burchard reaction for cholesterol
acetic anhydridesulfuric acid
Lipid w/3 fatty acids/glycerolstorage form90% in diet, 10% liverlipemia from chylomicrons
Trig
Enzyme method for triglycerides…Hydrolyzes to…
Lipase hydrolyzes triglyceride to form glycerol
Fredewald calculation for LDL
TC- (TG/5+ HDL)
Friedwald calculation for VLDL
TG/5
Cannot used Friedwald calculation for LDL/VLDL if…
TG is >400mg/dL
Risk factors for CHDage by gendershistory ofbp, HDLtwo conditions
> 45men, >55 womenfamily history of CHDsmokingbp >120, HDL <40D.mellitus, metabolic syndrome
Lipid goalsTCTrigLDLHDL
TC <200Trig <150LDL<100HDL>35
Condition where blood cholesterol is increased
hypothyroidismThyroid hormones help your liver process blood. When your thyroid hormone levels are low, your liver processes blood more slowly, which can lead to higher levels of cholesterol in your bloodstream
Examples of ….lipid deposits in vascular/legs/armsCAD, AMI, arterieslipid in brain, stroke
atheriosclerosis
Disease with increased TC, LDL and decreased HDLCalculate coronary risk index using these two parametersElevated beta liproprotein is what lipid and leads to which kind of disease
CHDTC, HDLLDL, cardiovascular
4 non protein nitrogen
urea, ammoniauric acidcreatinine
non protein nitrogen increased in plasma in renal impairment called
azotemia
Best way to evaluate renal impairment and what is most common analyte to monitor it
GFRcreatinine
Creatinine clearance calcbased off the principle that creatinine passes into the ultrafiltrate
U creat/P creat x mL/1440vol in mL, min/24hr
Correction for clerance by body surface area
creat clearx1.73/area
Used with eGFR to stage/monitor CKD
urine albumin
Made from creatine in muscle
Creatinine
Method for creatininereacts withcolor formed
Jaffealkaline picrateyellow-red
Rises more rapidly than serum creatinine in acute renal failure
BUN
BUN increased in these two things
renal impairmenthigh protein
diacetyl monoxime used in determining…by measuring…can be used in untreated urine because…
BUNureamethod isn’t measuring ammonia
Type of method for BUN that measures urea…reagent that reacts with urea…
Colorimetric methodreacts with diacetyl monoxime
Enzymatic method for BUN uses….which hydrolyzes…to…
ureasewhich hydrolyzes urea into ammoniaUnlike the colorimetric method using diacetyl monoxime used for BUN/urea
diacetyl monoxime-urease-
diacetyl monoxime-BUN/ureaurease-BUN/ammonia
BUN mg/dLCreatinine mg/dLBUN/creatinine ratioelevated creatinine will result in elevated BUN of how much
BUN 6-20mg/dLCreatinine around 1mg/dL10:1-20:1BUN will be elevated
GFR marker made by nucleated cells
cystatin c
end product of purine metabolism from nuclei, allantoin
uric acid
The colorimetric method for uric acid is an alkaline oxidation where uric acid reduces…to…
phospho-tungistic acid to tungsten blue
phosphotungistic acid used in
uric acid
Uric acid NV mg/dL
2.6-7.2
Hyperuricemia causes
-gout-leukemia/lymphoma (overproduction of new cells, more breakdown)-Lesch-Nyhan(The HGPRT deficiency causes a build-up of uric acid in all body fluids. The combination of increased synthesis and decreased utilization of purines leads to high levels of uric acid production.)
Disease where there is over production of uric acid that arent recycled; mostly malesThe HGPRT deficiency causes a build-up of uric acid in all body fluids. The combination of increased synthesis and decreased utilization of purines leads to high levels of uric acid production.)
Lesch-Nyhan
Uric acid is measured by… at 290nm before/after treatment with…
UV absorption at 290 before/after treatment with uricaseAlso use isotope dilution/MS
This is from bacterial action on contents of colon and metabolized by liver
ammonia
Analyte that is a prognostic indicator of liver failure
ammonianot eliminated by kidneys
Increased ammonia in these 3 main reasons
liver disease (cirrhosis, viral hep)Reye’s SyndromeReye’s syndrome is a rare condition that happens in children after a viral infection or illness, especially if they took aspirin (salicylate) to treat their symptoms. Reye’s syndrome targets their brain, blood and liver.impaired renal (increased urea,ammonia)
Syndrome that leads to increased ammonia, mostly kids, previous virus, salicylate
Reyes
Bromphenol blue or GLDH used to measure
ammonia
Nessler used to detect
used to detect ammoninapotassium iodide plusmercury iodide/chloride plussodium hydroxide in waterdirty brown precipitate
Disaccharide with 2 glucose
maltose
Disaccharide with 1 glucose, 1 galactose
lactose
disaccharide with 1 glucose, 1 fructose
sucrose
monosaccharide with 6 carbons
hexose
process that uses glucose for energy, changed to lactic acid for energy
glycolysis
process of glucose to glycogen
glycogenesis
process of glycogen to glucose
glycogenolysis
process of glucose from noncarb sources
gluconeogenesis
renal threshold for glucoseCSF glucose % of plasmabest anticoagulant
160-180mg/dLCSF 60-65% of plasmasodium flouride
Diabetes melliutusplasma/OGTTA1C
> 200mg/dL>=6.5%
Hypoglycemia mg/dL
70mg/dl
Hormones that regulate glucosewhich one decreases?all the rest increase
insulin, glucagonepineph/cortisolGH, ACTHT3/T4(Thyroxine)Stomatostainonly one decreases is insulin
hormones made in pancreas:alpha cells/increase or decreasebeta cells/increase or decreasedelta cells/increase or decrease
alpha: glucagon, increasebeta: insulin, decreasedelta: stomatostain, increase
peptide hormone made in beta cells and decreases blood glucose/goes into cells
insulin
steroid hormone that is a glucocorticoid, made in adrenal cortex, and increases blood glucose
cortisol
peptide hormone made in alpha cells, increases blood sugar by making glucose from glycogen
glucagon
hormone made in delta cells, inhibits secretion of insulin making more glucose in blood
stomatostain
hormone that is adrenaline, neurotransmitter and regulates glucose
epinephrine
glycogen storage diseaseincreased or decreased glucose
von Gierkesdecreased
diabetes where glucose is normal
insipidus
condition with tumor that results in increased insulinincreased or decreased glucose
insulinomadecreased glucose
two conditions that increase glucose
hashimotos(Hypothyroidism, which is caused by Hashimoto’s disease, decreases glucose absorption, leading to an accumulation of sugar. In turn, this accumulation of sugar causes more insulin to be produced to utilize excess glucose, eventually leading to insulin resistance.)cushings(increased cortisol)
most employed automated method for glucose uses what two enzymes where there’s oxidation that forms a chromagencontamination can happen with
glucose oxidase, peroxidasecontamination with catalase
Gold standard for glucose testing/higher specificity…Two enzymes used….Amount of… is proportional to glucoseIs read at…nm
Hexokinase methodHexokinase, G6PDNADH formed is proportional to glucose340nm
hexokinase method:what is reduced and measured?measured at what nm?
NAD coenzyme reduced to NADHmeasured at 340nm
Normal fasting blood glucose
70-110mg/dL
Test to confirm prenatal borderline blood glucose
3 hr GTT
HmgA1C binds to hmg and monitors long term diabetes/largest fraction of HbAhow long of picture of glucose?Normal?Diabetic?
2-3mthNormal 4.0-6.0%Diabetic 6.5%
Juvenille onset, insulin dependent, autoimmune destruction of beta cellsketoacidosis
Type 1
adult onset, non insulin, insulin resistance, no ketoacidosis, obsesity
Type 2
What is a byproduct of insulin and can differentiate between medication/exo insulin and what the body makes/endogenous insulin?
C-peptide
Diabetes caused by placental lactogen inhibiting insulin
GDMgestational diabetes mellitus
Measurement of light intensity, chemical rxn forms color and is absorbed at specific wavelenthvisible light 400-700, frequency inverse to wavelength, uses quartz cuvette for UV rangetungsten or deuterium
spectrophotometry
Filter used for QC of spectrophotometer and what it tests
holmium oxide glass filterwavelength accuracy
Meaasurement of emission of color when element is burned
flame photometry
Measurement of light abosorption of electromagnetic radiation
atomic absorption spectrophotometry
Atomic absorption measures using what light sourcealso uses monochormator, flame sample cell, PM tube
hollow cathod lamp