>1arcA (A:) observed residues (from ATOM records)
gvsgscnidvvcpegdgrrdiiravgaysksgtlactgslvnntandrkmyfltahhcgm
gtastaasivvywnyqnstcrapntpasgangdgsmsqtqsgstvkatyatsdftlleln
naanpafnlfwagwdrrdqnypgaiaihhpnvaekrisnstsptsfvawgggagtthlnv
qwqpsggvtepgssgspiyspekrvlgqlhggpsscsatgtnrsdqygrvftswtgggaa
asrlsdwldpastgaqfidglds