Catalase uses the H2O2 to oxidize a variety of other substrates (formic acid, formaldehyde, and alcohol) by the “peroxidation” reaction.

TLS Online TPP Program

#Id: 9322

#Unit 4. Cell Communication and Cell Signaling

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: 9323

#Unit 4. Cell Communication and Cell Signaling

Terminate the visual response involves phosphorylation of activated (R*) rhodopsin, but not its dark (R) form

TLS Online TPP Program

#Id: 9324

#Unit 4. Cell Communication and Cell Signaling

Rhodopsin kinase, a member of the GRK family of kinases catalyzes phosphorylation of activated rhodopsin

TLS Online TPP Program

#Id: 9325

#Unit 4. Cell Communication and Cell Signaling

Each opsin molecule has multiple principal serine and threonine phosphorylation sites on its cytosol-facing C-terminal segment.

TLS Online TPP Program

#Id: 9326

#Unit 4. Cell Communication and Cell Signaling

TLS Online TPP Program

#Id: 9327

#Unit 4. Cell Communication and Cell Signaling

The binding of arrestin to rhodopsin speeds up the inactivation process.