>2r23A (A:) observed residues (from ATOM records)
divmsqspsslavsagekvtmsckssqsllnsrtrknylawyqqkpgqspklliywastr
esgvpdrftgsgsgtdftltitsvqaedlavyyckqsynlrtfgggtkleikradaaptv
sifppsseqltsggasvvcflnnfypkdinvkwkidgsergvlnswtdqdskdstysmss
tltltkdeyerhnsytceathktstspivksfnrnec