Preparation of tyrosineO-[35S] sulfated cholecystokinin octapeptide from a nonsulfated precursor peptide - Nakahara, T; Waki, M; Uchimura, H; Hirano, M; Kim, JS; Matsumoto, T; Nakamura, K; Ishibashi, K; Hirano, H; Shiraishi, A (Anal Biochem, 1986)