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Chapter 7: Q11P (page 219)

Is myosin a fibrous protein or a globular protein? Explain.

Short Answer

Expert verified

Myosin is both a fibrous and a globular protein.

Step by step solution

01

Myosin structure

The myosin protein molecule has three main domains: the head domain, the neck domain, and the tail domain.

02

Globular subunit of myosin

The head domain is responsible for myosin’s motor activities, whereas the neck domain binds with the light chains. The head domain and the neck domain together makes up the globular subunit of myosin

03

Fibrous subunit of myosin

The tail domain is hydrophobic. This tail domain of one myosin joins with the tail domains of other myosins to form the thick filament in the sarcomere. Thus, the tail domain is the fibrous subunit of myosin.

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