>4l74B (B:) observed residues (from ATOM records)
rhvvicgwsestleclrelrgsevfvlaedenvrkkvlrsganfvhgdptrvsdlekanv
rgaravivdlesdsetihcilgirkidesvriiaeaeryenieqlrmagadqvispfvis
grlmsrsiddgyeamfvqdvlaeestrrmvevpipegsklegvsvldadihdvtgviiig
vgrgdeliidpprdysfragdiilgigkpeeierlknyisalvpr