>2ch1A (A:) observed residues (from ATOM records)
kftpppaslrnpliipekimmgpgpsncskrvltamtntvlsnfhaelfrtmdevkdglr
yifqtenratmcvsgsahagmeamlsnlleegdrvliavngiwaeravemserygadvrt
iegppdrpfsletlaraielhqpkclflthgdsssgllqplegvgqichqhdcllivdav
aslcgvpfymdkweidavytgaqvlgappgitpisispkaldvirnrrtkskvfywdlll
lgnywgcydepkryhhtvasnlifalrealaqiaeeglenqikrriecaqilyeglgkmg
ldifvkdprhrlptvtgimipkgvdwwkvsqyamnnfslevqgglgptfgkawrvgimge
cstvqkiqfylygfkeslkathpdyif