Ornithine and citrulline, which are not found in proteins, are intermediates in the biosynthesis of arginine and in the urea cycle.

TLS Online TPP Program

#Id: 9322

#XL - T Zoology

Guanylate cyclase–activating proteins, 

bind to guanylate cyclase and stimulate its activity, elevating cGMP level and causing the cGMP-gated ion channels to reopen.

TLS Online TPP Program

#Id: 9059

#XL - T Zoology

PKA always phosphorylates a serine or threonine residue that is located within the common sequence motif: X-Arg-(Arg/Lys)-X-(Ser/Thr)-Φ

TLS Online TPP Program

#Id: 8241

#XL - T Zoology

Dispersal is the movement of individuals from one area to another.

Dispersal involves individuals leaving their habitat of origin—where a seed was made or where a squirrel was born—and typically not returning.

TLS Online TPP Program

#Id: 344

#XL - R Botany

The liver PK isozyme (L form) is regulated by glucagon

TLS Online TPP Program

#Id: 8653

#XL - T Zoology

Degradation of Sic1 is induced by its phosphorylation by G1/S phase CDKs.