PD-1 has a structure similar to CTLA-4 and when activated negatively regulates T-cell function by inducing apoptosis of activated T cells. 

TLS Online TPP Program

#Id: 8406

#XL - Q Biochemistry

Vertebrate skeletal muscle contraction, also depends on set of specialized accessory proteins that are closely associated with the actin thin filaments:

a) Tropomyosin

b) Troponin

TLS Online TPP Program

#Id: 9401

#XL - T Zoology

Animal cognition

Some animal, especially many mammal, bird have cognitive ability that  extend to reasoning, problem solving, tool used and symbolic  communication.

TLS Online TPP Program

#Id: 4914

#XL - Q Biochemistry

TLS Online TPP Program

#Id: 9963

#XL - T Zoology

The palmitoleate attached to the Wnt protein binds to a specific site on the Fz extracellular domain and stabilizes the Wnt-Fz complex.

TLS Online TPP Program

#Id: 8147

#XL - Q Biochemistry

A clathrin molecule,

called a triskelion, is composed of : 

Three heavy chains

Three light chains