>4n27A (A:) observed residues (from ATOM records)
mpiyaynghkpqfadresnwiapdatligkvvvgenagfwfgavlrgdnepitigadtnv
qeqtimhtdigfpltigagctighrailhgctigentligmgaivlngakvgkncligag
tlvkegmeipdnslvvgsparvlrqlddaaveklrasakhyverghsfmrgmepa