>4u2nB (B:) observed residues (from ATOM records)
sdfpqhsqhvleqlnqqrqlgllcdctfvvdgvhfkahkavlaacseyfkmlfvdqkdvv
hldisnaaglgqvlefmytaklslspenvddvlavatflqmqdiitachalkslataqtl
qmeipnfgnsileclneqrlqglycdvsvvvkghafkahravlaasssyfrdlfnnsrsa
vvelpaavqpqsfqqilsfcytgrlsmndqdllmytagflqiqeimekgtefflk