>1xu1A (A:) SEQRES residues kkhsvlhlvpvnitskadsdvtevmwqpvlrrgrgleaqgdivrvwdtgiyllysqvlfh dvtftmgqvvsregqgrretlfrcirsmpsdpdraynscysagvfhlhqgdiitvkipra naklslsphgtflgfvkl