>2ch2D (D:) observed residues (from ATOM records)
ftpppaslrnpliipekimmgpgpsncskrvltamtntvlsnfhaelfrtmdevkdglry
ifqtenratmcvsgsahagmeamlsnlleegdrvliavngiwaeravemserygadvrti
egppdrpfsletlaraielhqpkclflthgdsssgllqplegvgqichqhdcllivdava
slcgvpfymdkweidavytgaqkvlgappgitpisispkaldvirnrrtkskvfywdlll
lgnywgcydepkryhhtvasnlifalrealaqiaeeglenqikrriecaqilyeglgkmg
ldifvkdprhrlptvtgimipkgvdwwkvsqyamnnfslevqgglgptfgkawrvgimge
cstvqkiqfylygfkeslkathpdyif