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65 Cards in this Set

  • Front
  • Back

Attack intracellular pathogens

Cellular immunity

T lymphocytes

Recognize and clear extracellular material

Humoral immunity

B lymphocytes

Activated B cell

Produces antibody

plasma cell

Manufacture antibody that specifically


recognizes antigen


B cell

Recognize and interact with antigen

Produce cytokines

CD4


T helper

Clear viral infected, tumor, and foreign tissue graft cells

CD8


T cytotoxic



any substance (usually


foreign) that combines with an antibody


or binds to a T cell


Antigen

antigen in its role of


eliciting an immune response


Immunogen

Responsible for specificity

Recognized by a specific antibody or

receptor


Epitope or antigenic determinants

Proteins composed of four polypeptide


chains joined by disulfide bonds


antibodies

5 classes of Igs


IgG, IgA, IgM, IgD, and IgE

Heavy chain determines class


antibodies

Imparts flexibility

Allows each ag-binding site to function

independently


hinge region

Idiotypes


Variable region – antigen binding

Binds to antigenic


determinant


Fragment, antigenbinding


(Fab)

Constant domain


Fragment,


crystallizable (Fc)

Parts of the antibody that are common


to a host.


Allotype

Ig class; determined by the heavy


chains


Isotype

Specific to the antigen stimulating the


response.


Idiotype

First antibody produced in immune


response


IgM

Five basic Ig molecules held together


with a joining (J) chain

Pentamer

10 potential ag-binding sites


IgM

Direct agglutinate

Efficient in complement (C’) activation


IgM

2 gamma heavy chains, two light chains

Monomer

Divalent


IgG

Inefficient in direct agglutination

2 needed to activate C’


IgG

80 % of total serum


concentration


IgG
serum half life 23 days
IgG
serum half life 5-6 days

IgM

very efficient at Activation of the


classical pathway of


complement


IgM

Optimal temperature


for reaction in


immunohematologic


tests room temp or below


IgM

Optimal temperature


for reaction in


immunohematologic


tests 37


IgG

Agglutination upon


immediate spin


IgM

Agglutination in antiglobulin


tests


IgG

Predominant in secretions

First line of defense - prevents foreign agents from entering body

Does not bind complement by classical pathway, but can activate alternate

pathway


IgA

First Ig class produced in primary immune response

Found on surface of unstimulated, resting B lymphocytes


IgM

Exists as monomer on unstimulated, resting B lymphocytes

No blood group antibodies known to be ___


IgD

Exists as monomer bound to basophils or mast cells

Binding of antigen triggers release of histamine (allergic reactions).

Involved in hypersensitivity - anaphylaxis, parasitic infections


IgE

All cross placenta


IgG

30+ serum proteins, made by liver cells


complement
amorph allele
ALLELE of a gene that appears to code for no detectable product
Whichtype of oligosaccharide chain is typically found in secretions?
Type 1 chains
type 1 chains found in secretions have what linkage?

β1→3 linkage
type 2 chains found on red cells have what linkage?
β1→4 linkage
Hh and Se (secretor) are on chromosome
19
what gene produces a glycosyltransferase that acts on type 2 chains - H ag on RBCs

H
what gene produces glycosyltransferase that acts on type 1 chains - H ag in secretions

Se
converts both branched and unbranched H antigens

A1
converts only unbranched H antigen

A2
dolichos biflorus is a source of

Anti A1 lectin from seed extracts
anti h lectin

ulex europaeus

Hh and Se (secretor) are on chromosome


19

produces a glycosyltransferase that acts


on type 2 chains


H

produces a glycosyltransferase that acts


on type 1 chains


Se

B13 linkage


Type 1 – Body Fluids and

Secretions

B14 linkage


Type 2 – Red Blood Cells

(Body Fluids and Secretions)

Produces -2-L-fucosyltransferase


H gene

Produces -3-Nacetylgalactosaminyltransferase


A gene

Produces -3-galactoslytransferase


B gene

Adds N-Acetylgalactosamine to H ag (GalNAc)


A gene

Adds D-galactose to H ag (Gal)


B gene

immunodominant

sugars

N-acetylgalactosamine (GalNAc)




A

immunodominant


sugars

D-Galactose


B

% population has Se gene (secretor)


78

another source of


Anti-A1 (lectin from seed extracts)


Dolichos biflorus

Anti-H lectin


Ulex europaeus