Isoleucine and Threonine have two chiral carbons so exists in multiple RS configuration.

TLS Online TPP Program

#Id: 1736

#Unit 4. Cell Communication and Cell Signaling

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: 1915

#Unit 4. Cell Communication and Cell Signaling

T-dependent (TD) response

TLS Online TPP Program

#Id: 9794

#Unit 6. System Physiology – Plant

Phytochromes are photoreceptors that absorb red and far-red light most strongly (600–750 nm)

they also absorb blue light (350-500 nm) and UV-A radiation (320–400 nm).

TLS Online TPP Program

#Id: 10480

#Unit 4. Cell Communication and Cell Signaling

Multi-hit model

LOF mutations in the tumor suppressors APC and p53 and GOF mutation in the oncogene K-RAS establishing that multiple mutations in the same cell are needed for the cancer to form.

TLS Online TPP Program

#Id: 3857

#Unit 5. Developmental Biology

Phosphorylation of RegA is mediated by sensor histidine kinases/phosphatases which either phosphorylate or dephosphorylate themselves on a histidine residue when a signal molecule binds to their sensor domain.