Human Anatomy and Physiology

What are the functions of proteins?

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2013-06-09 21:08:01

membrane transport,cell recognition,metabolism,structure

Proteins have many functions. They serve as enzymatic catalysts,

are used as transport molecules (hemoglobin transports oxygen) and

storage molecules (iron is stored in the liver as a complex with

the protein ferritin); they are used in movement (proteins are the

major component of muscles); they are needed for mechanical support

(skin and bone contain collagen-a fibrous protein); they mediate

cell responses (rhodopsin is a protein in the eye which is used for

vision); antibody proteins are needed for immune protection;

control of growth and cell differentiation uses proteins

(hormones). These are just a few examples of the many, many

functions of proteins.

some proteins control the rate of reactions and regulate cell


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