Kharitonenkov I G, Siniakov M S, Suvorova Z K
J Gen Virol. 1980 Oct;50(2):419-22. doi: 10.1099/0022-1317-50-2-419.
The tryptophan and tyrosine content of the bromelain-released subtype H3 haemagglutinin (H3 BHA) of influenza virus were measured by u.v. absorption and fluorescence techniques. The values obtained (8 and 18 residuces, respectively) are in close agreement with those derived from amino acid analysis. Essentially all of th tryptophan residues are demonstrated to be localized on the surface of the BHA molecule.
