Binding of acetylcholine triggers the opening of an associated K+ channel  in the plasma membrane via the Gβγ subunit of a Gi protein

TLS Online TPP Program

#Id: 8370

#XL - Q Biochemistry

In the absence of ATP, the myosin head is firmly attached to the actin filament. 

TLS Online TPP Program

#Id: 8369

#XL - Q Biochemistry

The length of the myosin II neck domain determines the rate of movement.

TLS Online TPP Program

#Id: 8368

#XL - Q Biochemistry

Myosin V

Two heads but does not assemble into filaments

Large and processive

Function- Organelle transport

TLS Online TPP Program

#Id: 8367

#XL - Q Biochemistry

Myosin II

Two heads and assembles into bipolar filaments

Small and non-processive

Function- Contraction

TLS Online TPP Program

#Id: 8366

#XL - Q Biochemistry

Myosin I

single head domain

Function- Membrane association, endocytosis

TLS Online TPP Program

#Id: 8365

#XL - Q Biochemistry

Three classes of myosins:

Myosin I

Myosin II

Myosin V