What are the differences among primary secondary and tertiary structure in proteins
Answers
the primary structure refers to the sequence of amino acids in a polypeptide chain ( it is genetically determined ) .. this rope of amino acids is folded so called secondary structure which is 2 types : alpha helix where the rope of amino acid is twisted to form a helix .. and beta sheets where several ropes are arranged longitudinally beside each other ( just like a group of threads forming a textile ) both forms needs special bonds rather than the peptide bond to stabilize . these bonds may be disulphide bond (which is formed between two sulpher atoms of 2 sulpher containing amino acids as cystine ) and may be hydrogen bond .. these two forms is folded more and more to form tertiary structure which is also stabilized by different types of bonds ... In addition , there is also a quaternary structure where more than one folded (tertiary structure) peptides bind together as in hemoglobin .