X-ray structural study of D-valyl-L-tyrosyl-L-valine dihydrate

N-Acetyl-L-tyrosine methyl ester monohydrate at 293 and 123 K

“…(5) 144Symmetry codes: (4) 144Symmetry codes: Notes: (*) equivalent to N2ÐC1ÐC2ÐN1 in tripepetides. References: (a) N-acetyl-l-tyrosine ethyl ester (Soriano-Garcõ Âa, 1993); N-acetyl-l-tyrosine ethyl ester (b) at room temperature and (c) at 110 K (Dahaoui et al, 1999) {notice the opposite sequence of torsion angle signs, which indicates the opposite con®guration at C ; in fact, the deposited data for N-acetyl-dtyrosine ethyl ester [Cambridge Structural Database (Allen, 2002; Version 5.28) refcodes ATYREE02 and ATYREE03] concern the N-acetyl-d-tyrosine ethyl ester structural model}; (d) glycyl-l-tyrosyl-l-alanine dihydrate (Eggleston & Baures, 1992); (e) l-leucyl-l-tyrosyl-l-leucine monohydrate (Wu et al, 1987); ( f ) d-valyl-l-tyrosyl-l-valine dihydrate (Mishnev et al, 1978); (g) l-tyrosine; (h) l-tyrosine hydrochloride (Frey et al, 1973).…”