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TLS Online TPP Program

#Id: 8958

Genetic exchange also happens between distantly related organisms by horizontal gene transfer, or HGT.

HGT is particularly important to prokarytotes and is the most common way by which they acquire new genes.

#Section 3: Genetics, Cellular and Molecular Biology #Origin of new genes and proteins #Part B Pointers
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TLS Online TPP Program

#Id: 10365

#Section 2: General Biology

Antigen pieces are held within the binding groove of a cell surface protein called the major histocompatibility complex (MHC) molecule which recognized by T cell
TLS Online TPP Program

#Id: 10366

#Section 2: General Biology

Class I MHC, glycoproteins expressed on the surface of nearly all nucleated cells; the major function of the class I is presentation of endogenous peptide antigens to CD8+ T cells.
TLS Online TPP Program

#Id: 10367

#Section 2: General Biology

Daudi tumor cells, which are unable to synthesize β 2-microglobulin. 
TLS Online TPP Program

#Id: 10368

#Section 2: General Biology

Class II MHC glycoproteins expressed predominantly on pAPCs, where they primarily present exogenous antigenic peptides to CD4+ T cells.
TLS Online TPP Program

#Id: 10369

#Section 2: General Biology

Class III MHC genes encode several different proteins, some with immune functions, include the complement components C4, C2, and factor B, TNF-α and Lymphotoxin-α [TNF- α]. 
TLS Online TPP Program

#Id: 10370

#Section 2: General Biology

HLA-G

These are present on fetal cells at the maternal-fetal interface and are credited with inhibiting rejection by maternal CD8+ T cells by protecting the fetus from identification as foreign.