III. Underground stem modification

TLS Online TPP Program

#Id: 8367

#XL - Q Biochemistry

Myosin II

Two heads and assembles into bipolar filaments

Small and non-processive

Function- Contraction

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#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

TLS Online TPP Program

#Id: 8364

#XL - Q Biochemistry

The first myosin discovered

Myosin II, was isolated from skeletal muscle.

TLS Online TPP Program

#Id: 8363

#XL - Q Biochemistry

Myosins have 

Motor head domain

Lever-arm neck domain

Cargo-binding tail domain

TLS Online TPP Program

#Id: 8362

#XL - Q Biochemistry

Myosin 

Actin-based motors powered by ATP hydrolysis.