what are the four levels or structure of protien
as you must know proteins are made of amino acids
arranged in polypeptide chains, and the order
of them in these chains is called primary structure.
The regular way in which the polypeptide chains
are arranged in space to form a protein molecule
is called secondary structure.
The arrangement of the three-dimensional structure
of the polypeptide chain in space is the tertiary
The arrangement of the combination of two or more
polypeptide chains constitutes the quartenary
Quite simple, isn't? If you just remember that
the molecular weights of proteins range usually
from 10,000 to 100,000 daltons (one dalton is the
weight of one hydrogen atom) and that 20 different
amino-acids in a chain 100 amino acids long can be
arranged in far more than 10 to its 100 potency
( number 1 followed by 100 zeroes) ways!
Thanks for asking NEWTON!
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Update: June 2012