Transcript Document
PROTEINS
The functions of proteins
Protein- polymer constructed from a set of just twenty kinds
of monomers called amino acids.
Form structures such as hair and fur, make up muscles, and
provide long term nutrient storage.
Circulate in the blood and defend the body from harmful
microorganisms, act as signals.
Control chemical reactions in a cell.
PROTEINS
Amino acids- building blocks of proteins
Consists
of a central carbon atom bonded to four
partners.
3 of the partners are the same in all amino acids
1
is a hydrogen atom
2 others are a carboxyl group & an amino group
Side
group (R-group)
PROTEINS
Polypeptide- chain of linked amino acids
Amino acids are linked together by dehydration
reaction.
Proteins are made up of one or more
polypeptide chains.
There are 20 different amino acids.
PROTEIN SHAPE
Each polypeptide is twisted, folded, & coiled
into a unique shape.
Denaturation - an unfavorable change in
temperature, pH, or some other quality of the
environment can cause a protein to unravel and
lose its normal shape