>4dw2U (U:) observed residues (from ATOM records)
fttienqpwfaaiyrrvtyvcggslispcwvisathcfidypkkedyivylgrsrlnsnt
qgemkfevenlilhkdysadtlahhndiallkirskegrcaqpsrtiqtialpsmyndpq
fgtsceitgfgkeqstdylypeqlkmtvvklishrecyygsevttkmlcaadpqwqgdsg
gplvcslqgrmtltgivswgrkpgvytrvshflpwirshtk