A trait can evolve by sexual selection if it increases a male’s overall fitness, even if it decreases survival.

Exaggerated secondary sexual traits are favored by sexual selection because they increase male mating success.

TLS Online TPP Program

#Id: 10368

#XL - Q Biochemistry

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

#XL - Q Biochemistry

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

#XL - Q Biochemistry

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.

TLS Online TPP Program

#Id: 10371

#XL - Q Biochemistry

A given MHC molecule can bind numerous different peptides, and some peptides can bind to several different MHC molecules. Because of this MHC molecule is often referred to as “promiscuous”.

TLS Online TPP Program

#Id: 10372

#XL - Q Biochemistry

TLS Online TPP Program

#Id: 10373

#XL - Q Biochemistry

MHC-Peptide Interaction