>1p57B (B:) observed residues (from ATOM records)
ivggrdtslgrwpwqvslrydgahlcggsllsgdwvltaahcfpernrvlsrwrvfagav
aqasphglqlgvqavvyhggylpfnsndialvhlssplplteyiqpvclpaagqalvdgk
ictvtgwgntqyygqqagvlqearvpiisndvcngadfygnqikpkmfcagypeggidac
qgdsggpfvcedsisrtprwrlcgivswgtgcalaqkpgvytkvsdfrewifqaikthse
asgmvtq