[Modification of the amino acid residues in the serum albumin of oncological patients].

A modified form of albumin isolated from the blood of oncological patients was studied. A modification of N-terminal amino acid, 50% tyrosine groups, free SH-group of cysteine and lysine group in the fourth position in the N-terminal sequence of amino acids was discovered. The possibility of a post-translation modification of serum albumin in disease in individual amino acid groups is discussed.