>3a74B (B:) observed residues (from ATOM records)
elndqlrvrreklkkieelgvdpfgkrferthkaeelfelygdlskeeleeqqievavag
rimtkrgmgkagfahiqdvtgqiqiyvrqddvgeqqyelfkisdlgdivgvrgtmfktkv
gelsikvssyefltkalrplpekdieqryrqryldlimnpeskktfitrsliiqsmrryl
dshgylevetpmmhavaggaaarpfithhnaldmtlymriaielhlkrlivgglekvyei
grvfrnegistrhnpeftmlelyeayadfrdimkltenliahiatevlgttkiqygehlv
dltpewrrlhmvdaikeyvgvdfwrqmsdeearelakehgvevaphmtfghivneffeqk
vedkliqptfiyghpveisplakknpddprftdrfelfivgrehanaftelndpidqrqr
feeqlkereqgndeahemdedflealeygmpptgglgigvdrlvmlltnspsirdvllfp
qmrh