Web making in spiders

Spiders make silk in a special part of their body called a gland and use their legs to pull it out of their bodies. This is called spinning.

TLS Online TPP Program

#Id: 9323

#XL - T Zoology

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

TLS Online TPP Program

#Id: 9324

#XL - T Zoology

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

TLS Online TPP Program

#Id: 9325

#XL - T Zoology

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

TLS Online TPP Program

#Id: 9326

#XL - T Zoology

TLS Online TPP Program

#Id: 9328

#XL - T Zoology

Arrestin binds tightly to rhodopsin only when rhodopsin kinase has phosphorylated a sufficient number of C-terminal serines and threonines.

TLS Online TPP Program

#Id: 9329

#XL - T Zoology

The entire process of rhodopsin phosphorylation and its inactivation by arrestin is fast completed within 50ms.