ANTIGEN Flashcards
They are glycoproteins by nature
Immunoglobulin and antibodies
Found in serum portion of blood
Glycoproteins
Compositions:
Protein :
Carbohydrate:
Protein: 82-96%
Carbohydrates: 2-14%
Behavior of specific methods
Serum electrophoresis
Screening test of cc detects clinical disorder
Electrophoresis
Different factor of immunoglobulin
Cellulose acetate
It has recommended pH alkali
Cellulose acetate (pH 8.6)
Differentation of material
Citrate agar
Acidic pH are required
Citrate agar (pH 6-6.3)
Mnemonics of immunoglobulin
G - IgG
A - IgA
M - IgM
E -IgE
D - IgD
Normal serum electrophoresis patterns
Albumin
Alpha 1 globulin
Alpha 2 globulin
Beta globulin
Gamma globulin/ gamma region
Immunoglobulin play a role as _________
Antigen recognition
Immunoglobulin help in process/biological activity in _______________ and _____________
Opsonization and compliment activation
Interaction in specific antigen
Antigen recognition
act as Preparation for eating in phagocytosis
Opsonization
Compliment system types
Antigen dependent: classical pathway
Antigen independent: alternative and lytic pathway
Most abundant proteins
Albumin
Slowest protein
Gamma region/ gamma globulin
Region where immunoglobulin found
Gamma region/ gamma globulin
Effect on beta region
Beta gamma bridging
Condition in beta gamma bridging
Liver cirrhosis
Tall Spike pattern in gamma region (has elevated plasma protein)
Multiple myeloma
Protein found in multiple myeloma
Bence jones protein
Full discovery light chain of immunoglobulin in multiple myeloma
Bence jones protein
Bence jones protein
Temperature:
Dissolving temperature:
Temperature: 60 degree celsius
Dissolving temperature: 80 degrees Celsius
Corresponding proteins: alpha 1 globulin
- Alpha 1 antitrypsin
- Alphafetoprotein
Corresponding proteins: alpha 2 globulin
- ceuloplasmin
- haptoglobin
- alpha 2 macroglobulin
Corresponding proteins: beta globulin
- hemopoir
- transterin
- fibrinogen
- lipoprotein
- protein compliment system
Corresponding proteins: gamma region
- antibodies/immunoglobulin
Basic 4 chain polypeptide
2 large: heavy or H chain
2 small: light or L chain
Chain held together by noncovalent forces
Disulfide linkage/bonds
Disulfide interchain bridge
Structure of Immunoglobulins was first describe by two scientist.
Gerald Edelman and Rodney Porter
Edelman’s work centered on using the__________________ to separate
out immunoglobulins on the basis of molecular weight.
analytical ultracentrifuge
Immunoglobulin IgG product
Sedimentation coefficient rate
IgG has
7s (svedberg unit)
What use to unfold IgG
7 molar of urea
Used reducing reagent of edelman
2-mercapthoethanol/ mercapthoethanol
2 separate fractions in immunoglobulin IgG
3.5s = 50,000 dalton (heavy chain)
2.2s = 22,000 dalton (light chain)
Year the won noble prize of edelman and porter
1972
FAB mean
Fragment of antigen binding
FC mean
Fragment crystallizable
scientist discover papain digestion
Rodney porter
Papain digestion has ______fragment
3 fragment
Cleave of 3 fragment in papain digestion
2 fab (1 light chain; half heavy chain)
1 fc ( 2 half heavy chain)
Where can you find na fab
Always in Y
Where can you see Fc
Always in the body
Scientist discover pepsin digestion
Alfred nisonoff
Pepsin digestion has ______ fragment
2 fragment
Cleave of 2 fragment in pepsin digestion
1 fab (2 light chain; 2 half heavy chain)
1 fc ( 2 half heavy chain; disintegrated inter small pieces)
Structure of immunoglobulin
Variable region
Constant
Variable region
Under:
Located:
Under: Fab
Located: amino terminal end
Constant
Under:
Located:
Under: FC
Located: carbonyl terminal
Domains involved by group
IgG, IgA, and IgD = GAD
IgM and IgE = ME
Domains of IgG, IgA and IgD
Light chain: 2 domains
Heavy chain: 4 domains
Domains of IgM and IgE
Light chain: 2 domain
Heavy chain: 5 domain
Light chain discovered in abnormal protein to patient with
Multiple myeloma
Kappa
Chromosome:
Amino acid:
Chromosome: 2
Amino acid: 200
Lambda
Chromosome:
Amino acid:
Chromosome: 22
Amino acid: 220
Heavy chain has amino acid
110 amino acid
Immunoglobulin classes
IgG:
IgA:
IgM:
IgE:
IgD:
IgG: gamma chain
IgA: alpha chain
IgM: Mu chain
IgE: epsilon chain
IgD: delta chain
Antibody variation
Isotype
Allotype
Idiotype
Isotype is under
Heavy chain/ common immunoglobulin
Allotype is under
Constant region, immunoglobulin subclasses and kappa
Idiotype
Variable region
Kappa allotype
IgG = 4 subclasses
IgA = 2 subclasses
Hinge region composed of
Proline
Make flexible of Ig and antigen binding works independently
Proline
Basic immunoglobulin structure
Monomer
Dimer
Polymer
Basic immunoglobulin structure and antigen binding site involved
Monomer: 2 antigen binding site
Dimer: 4 antigen binding site
Polymer: more than 4 antigen binding site
Basic immunoglobulin structure according monomer
IgG, IgA (serum IgA/IgA 1), IgM (only found in area of b cell), IgE, IgD
Basic immunoglobulin structure according dimer
IgA (secretory IgA/ IgA 2)
Basic immunoglobulin structure according polymer/pentameric
IgM (largest)