>4n99A (A:) observed residues (from ATOM records)
mkftverehllkplqqvsgplpilgnlllqvadgtlsltgtdlememvarvalvqphepg
attvparkffdicrglpegaeiavqlegermlvrsgrsrfslstlpaadfpnlddwqsev
eftlpqatmkrlieatqfsmahqdvryylngmlfetegeelrtvatdghrlavcsmpigq
slpshsvivprkgvielmrmlnplrvqigsnnirahvgdfiftsklvdgrfpdyrrvlpk
npdkhleagcdllkqafaraailsnekfrgvrlyvsenqlkitannpeqeeaeeildvty
sgaemeigfnvsyvldvlnalkcenvrmmltdsvssvqiedaasqsaayvvmpmrl