CC2 LAB: LIPASE AND AMYLASE Flashcards
to catalyze oxidation/reduction reactions
oxidoreductases
to transfer functional group from one substance to another
transferases
formation of 2 products from a substrate by hydrolysis using water
hydrolases
intramolecular rearrangements
isomerases
non-hydrolytic addition or removal of groups from substrates
lyases
join together 2 molecules by the synthesis of new bonds
ligases
lipase is from what major class of enzymes
hydrolases
systematic name of lipase
triacylglycerol acylhydrolase
specific enzymes inside the pancreas
lipase
amylase
substrate of lipase
fats
products of lipase
alcohol
fatty acids
activators of lipase
colipase
bile salts
what does lipase attacks?
ester linkages
classic-cherry crandall method modified substrate
triolein
lipase acute pancreatitis: onset
4-8 hours
lipase acute pancreatitis: normalize
8-14 days
lipase acute pancreatitis: peak
24 hours
lipase assay optimal ph
8.8 pH
lipase assay normal temp
40 degrees celsius
what methods does lipase assay do
titration
turbidimetric method
classic-cherry crandall method substrate
olive oil
what does the method classic-cherry crandall used
titration
in lipase what enzymes are based on coupled reactions
peroxidase
glycerol kinase
in what sample or specimen is the lipase stable
serum
how long does the lipase last if left in room temp
1 week
how long does the lipase last if left in the refrigerator at 4 degrees celsius
3 weeks
what will be the result of there is hemolysis in the sample
false low results
the amylase is from what major class of enzymes
hydrolase
reference ranges of lipase
0-1.0 U/mL
37 degrees celsius
<0.6 ukat/L
catalyzes the breakdown of starch and glycogen to monosaccharides
amylase
hydrolizes the ester linkages of fats to produce alcohols and fatty acids
lipase
tissue sources of amylase
salivary glands
acinar cells of pancreas
is a polysaccharide, made up of multiple glucose
starch
long and unbranched chain linked by a-1,4 glycosidic bonds
amylose
branched chain polysaccharide with a-1,6 linkages
amylopectine
substrate of amylase
starch/glycogen
storage for of glucose
glycogen
product of amylase
monosaccharides:
-glucose
-maltose
-dextrin
activator of amylase
calcium ions
chloride
what does amylase attacks
a-1,4 glycosidic bonds
amylase acute pancreatitis: onset
5-8 hours
amylase acute pancreatitis: peak
24 hours
amylase acute pancreatitis: normalize
2-5 days
measures the disappearance of starch substrate
amyloclastic
measures the appearance of the product
saccharogenic
coupling of several enzyme systems to monitor amylase activity
continuous monitoring
measures the increasing color from production of product coupled with a chromogenuc dye
chromogenic
what color does amyloclastic gives
dark-blue
amylase coupled enzyme absorbance of NADH is at
@340 nm
optimum pH of amylase
6.9-7.0
absorbance of NAD+
@260 nm
absorbance of NADH
@340 nm
inhibits salivary amylase
wheat germ lectin
amylase is stable in what samples
serum
urine
the samples of amylase in rt can last up to
1 week
the samples of amylase in 4 degrees celsius can last up to
2 months or 6 months
you can detect acute pancreatitis in what enzyme
amylase
lipase
anticoagulants used in amylase
citrate
edta
oxalate
capacity of the machine to read the sample
linearity
measurement of true negative
specificity
measurement of true positive
sensitivity