>2py3B (B:) observed residues (from ATOM records)
lpedpkwefprdkltlgkplggqvvmaeavgidkdkpkeavtvavkmlkddatekdlsdl
vsememmkmigkhkniinllgactqdgplyvivgyaskgnlreylrarrppgeeqmtfkd
lvsctyqlargmeylasqkcihrdlaarnvlvtennvmkiadfglardinnidyykkttn
grlpvkwmapealfdrvythqsdvwsfgvlmweiftlggspypgipveelfkllkeghrm
dkpanctnelymmmrdcwhavpsqrptfkqlvedldriltlttn