What are the functions of proteins?
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