>3a12B (B:) observed residues (from ATOM records)
tiydyyvdkgyepskkrdiiavfrvtpaegytieqaagavaaesstgtwttlypwyeqer
wadlsakaydfhdmgdgswivriaypfhafeeanlpgllasiagnifgmkrvkglrledl
yfpeklirefdgpafgiegvrkmleikdrpiygvvpkpkvgyspeefeklaydllsngad
ymkddenltspwynrfeeraeimakiidkvenetgekktwfanitadllemeqrlevlad
lglkhamvdvvitgwgalryirdlaadyglaihghramhaaftrnpyhgismfvlaklyr
ligidqlhvgtagagkleggkwdviqnarilreshykpdendvfhleqkfysikaafpts
sgglhpgniqpviealgtdivlqlgggtlghpdgpaagaravrqaidaimqgipldeyak
thkelaralekwghvtpv