>4u2nA (A:) observed residues (from ATOM records)
sdfpqhsqhvleqlnqqrqlgllcdctfvvdgvhfkahkavlaacseyfkmlfvdkdvvh
ldisnaaglgqvlefmytaklslspenvddvlavatflqmqdiitachalkslaqtlqme
ipnfgnsileclneqrlqglycdvsvvvkghafkahravlaasssyfrdlfnnsrsavve
lpaavqpqsfqqilsfcytgrlsdqdllmytagflqiqeimekgtefflk