CAP–cAMP complex stimulates transcription of the lac operon by binding to an activator-binding site adjacent to the promoter and helping RNA polymerase bind to the promoter.

TLS Online TPP Program

#Id: 1387

#Unit 4. Cell Communication and Cell Signaling

Skeletal muscle contraction is subject to thin-filament regulation.

TLS Online TPP Program

#Id: 1388

#Unit 4. Cell Communication and Cell Signaling

In vertebrate smooth muscle, phosphorylation of the myosin regulatory light chain (LC) activation.

TLS Online TPP Program

#Id: 1389

#Unit 4. Cell Communication and Cell Signaling

Myosin light-chain kinase (MLCK) phosphorylates MLC and regulated by the level of cytosolic free Ca2+.

TLS Online TPP Program

#Id: 1390

#Unit 4. Cell Communication and Cell Signaling

Myosin V family of proteins, the most processive myosin motors known, transport cargo along actin filaments.

TLS Online TPP Program

#Id: 1391

#Unit 4. Cell Communication and Cell Signaling

Actin thin filaments and myosin II thick filaments assemble into contractile structures.

TLS Online TPP Program

#Id: 1392

#Unit 4. Cell Communication and Cell Signaling

The giant protein titin extends through the thick filaments and attaches to the Z disk.