>4z0zA (A:) observed residues (from ATOM records)
apitapditsickdassgignqegairtrkccppslgkkikdfqfpndkkvrmrwpahkg
tkkqvddyrraiaamralpdddprsfvsqakihcaycnggytqvdsgfpdidiqihnswl
ffpfhrwylyfyerilgslidepnfalpywkwdepkgmpisniflgdasnplydqyrdan
hiedrivdldydgkdkdipdqqqvacnlstvyrdlvrngvdptsffggkyvagdspvang
dpsvgsveagsxtavhrwvgdptqpnnedmgnfysagydpvfyihhanvdrmwklwkelr
lpghvditdpdwlnasyvfydenkdlvrvynkdcvnldklkynfien