>3ct7B (B:) observed residues (from ATOM records)
mkispslmcmdllkfkeqiefidshadyfhidimdghfvpnltlspffvsqvkklatkpl
dchlmvtrpqdyiaqlaragadfitlhpetingqafrlideirrhdmkvglilnpetpve
amkyyihkadkitvmtvdpgfagqpfipemldklaelkawreregleyeievdgscnqat
yeklmaagadvfivgtsglfnhaenideawrimtaqila