>4l50B (B:) observed residues (from ATOM records)
egcleyetqlrrqfslqhvrvipgdadvggrlgigaahmlmsllqpqqmlaigfgeatmn
tlqrlsgfissqqirlvtlsggvgsymtgigqlnaacsvniipaplrassadiartlkne
ncvkdvllaaqaadvaivgigavsqqddatiirsgyisqgeqlmigrkgavgdilgyffd
akgdvvtnikihneliglplsalktipvrvgvaggenkaeaiaaamkggyinalvtdqdt
aaailrs