>3stfB (B:) observed residues (from ATOM records)
mdikinditlgnnspfvlfgginvlesldstlqtcahyvevtrklgipyifkasfdkanr
ssihsyrgvgleeglkifekvkaefgipvitdvhephqcqpvaevcdviqlpaflarqtd
lvvamaktgnvvnikkpqflspsqmknivekfheagngklilcergssfgydnlvvdmlg
fgvmkqtcgnlpvifdvthslqgrraqaldlalagmatrlaglfleshlledflirikal
ddliksqpilt