>1xu7A (A:) observed residues (from ATOM records)
qplneefrpemlqgkkvivtgaskgigremayhlakmgahvvvtarsketlqkvvshcle
lgaasahyiagtmedmtfaeqfvaqagklmggldmlilnhitntslnlfhddihhvrksm
evnflsyvvltvaalpmlkqsngsivvvsslagkvaypmvaaysaskfaldgffssirke
ysvsrvnvsitlcvlglidtetamkavsgivhmqaapkeecaleiikggalrqeevyyds
slwttllirnpsrkileflysts