>4q50D (D:) observed residues (from ATOM records)
lalsltadqmvsalldaeppilyseasmmglltnladrelvhminwakrvpgfvdltlhd
qvhllecawleilmiglvwrsmehpgkllfapnllldrnqgkcvegmveifdmllatssr
frmmnlqgeefvclksiillnsgvksleekdhihrvldkitdtlihlmakagltlqqqhq
rlaqlllilshirhmsnkgmehlysmlyglllemld