>3v4nB (B:) observed residues (from ATOM records)
smtigidkisffvppyyidmtalaearnvdpgkfhigigqdqmavnpisqdivtfaanaa
eailtkedkeaidmvivgtessideskaaavvlhrlmgiqpfarsfeikeacygataglq
laknhvalhpdkkvlvvaadiakyglnsggeptqgagavamlvsseprilalkednvmlt
qdiydfwrptghpypmvdgplsnetyiqsfaqvwdehkkrtgldfadydalafhipytkm
gkkallakisdqteaeqerilaryeesiiysrrvgnlytgslylglisllenattltagn
qiglfsygsgavaefftgelvagyqnhlqkethlalldnrtelsiaeyeamfaetldtdi
dqtledelkysisainntvrsyrn