why sulphur is important in biological molecules
Answers. Best Answer: Sulfur is found in nearly all proteins-it is part of the amino acids methionine and cysteine. Keratin, which comprises hair, nails, and eyelashes, among other things, contains a lot of cysteine (human hair is apparently used as an industrial source of cysteine).One important biochemical function of sulfur is its ability to bind metal ions.hiol groups (the chemical group containing sulfur in methionine and cysteine) can react with each other to form disulfide bonds. These bonds help control the shape of proteins.