>3u57A (A:) observed residues (from ATOM records)
ndatrisrsdfpadfimgtgssayqieggardggrgpsiwdtfthrrpdmirggtngdva
vdsyhlykedvnilknlgldayrfsiswsrvlpggrlsggvnkeginyynnlidgllang
ikpfvtlfhwdvpqaledeyggflsprivddfceyaelcfwefgdrvkhwmtlnqpwtfs
vhgyatglyapgrgrstgnpgtepywvthhlllahaaavelyknkfqrgqegqigishat
qwmepwdensasdveaaaraldfmlgwfmepitsgdypksmkkfvgsrlpkfspeqskml
kgsydfvglnyytasyvtnasnfsyntdihvtyetdrngvpigpqsgsdwlliypegirk
ilvytkktynvpliyvtengvddvkntnltlsearkdsmrlkylqdhifnvrqamndgvn
vkgyfawslldnfewgegygvrfgiihidyndnfarypkdsavwlmnsfhk