Antibodies Flashcards
What do you call specific glycoproteins produced in response to an antigenic stimulation?
Immunoglobulins
What part of the antibody determines the immunoglobulin class?
heavy chain
The Heavy chain is encoded by what chromosome?
Chromosome 14
The light chain is encoded in what chromosome?
Kappa (ch 2) and Lambda (ch 22)
This links the H-H chain, H-L chain
Disulfide bonds
L-L chain is only found in where?
Bence Jones protein
This provides flexibility of the antibody due to Proline
Hinge region
The variable region contains what region?
Fab region (PARATOPE), antigen binding site
This determines the specificity of the antibody
Hypervariable region
Constant region contains the _________ region
Fc region (fragment crystallizable)
This is composed of 1 variable and 1 constant domain
Light chain
This is composed of 1 variable and 3/4 constant domain
Heavy chain
Rodney Porter described Ab structure using _____
papain
Rodney Porter described Ab structure using Papain, yields 3 products, what are those?
“ABOVE”
1 Fc, 2 Fab
Alfred Nisonoff described Ab structure using Pepsin, yields 2 products, what are those?
“BELOW”
1 Fc, 1 F(ab)2
What is considered an incomplete immunoglobulin?
IgG
What is the main antibody for SECONDARY immune response?
IgG
What IgG best in crossing the placenta?
IgG1
“PG 134”
What IgGs can fix complement?
“GC 312”
IgG3 > IgG1 > IgG2
IgG is best in what reaction?
Pecipitation
IgG responds best in what type of antigen?
Protein antigens
What Ig is considered the Macroglobulin or Complete immunoglobulin?
IgM
IgM is the main Ab for ________ immune response, and indicate acute infection
PRIMARY/EARLY
IgM is effective in what type of reaction?
Agglutination reaction
This Ig is formed in response to G- bacteria and endotoxin neutralization
IgM
IgM beest responds to what to of antigens?
Carbohydrate
RF and Cold Agglutinins are what type of Ig?
IgM
What Ig that is monomer in serum and dimer on secretions?
IgA
Ig present in secretions, saliva, milk?
IgA
What Ig is present in B cell surface?
IgD
IgE, AKA?
REAGIN
This Ig binds to mast cells and triggers hypersensitivity
IgE
What Ig also plays a role in defense to parasites?
IgE
This antibody is present in healthy indiv, heavy chain that determines the Ig class
Isotype
A type of Ab that has a variation in the constant region
Allotype
What type of Ab that has a difference in the variable region that gives its specificity?
Idiotype
IgG half life?
23 days (21-25d)
IgM half life?
6 days
IgA half life?
5 days
IgD half life?
1-3 days
IgE half life?
2-3 days
IgM MW?
900,000 mw
IgG MW?
150,000 mw
Sedimentation rate:
IgG
IgM
IgA
IgD
IgE
IgG: 7s
IgM: 19s
IgA: 7s,11s
IgD: 7s
IgE: 8s
Ig present in colostrum?
IgA, IgG
What are fused B cells and myeloma cells capable of secreting antibodies idefinitely?
Hybridoma cells
In monoclonal Abs, the B cell is fused to a myeloma cell by using what substance?
PEG
What media is used culturing hybridoma cells?
HAT media
(Hypoxanthine Aminopterine Thymidine)
A substance in the media used for DNA production in creating monoclonal Abs
Thymidine, Hypoxanthine
This susbstance is used to block the production of new nucleotides for the culture of monoclonal Abs
Aminopterin