Chains and heterogens:
PDB Chain Sequences:
>2xxrA (A:) gsnrslivttileepyvlfkksdkplygndrfegycidllrelstilgftyeirlvedgk ygaqddvngqwngmvrelidhkadlavaplaityvrekvidfskpfmtlgisilyrkgtp idsaddlakqtkieygavedgatmtffkkskistydkmwafmssrrqsvlvksneegiqr vltsdyaflmesttiefvtqrncnltqigglidskgygvgtpmgspyrdkitiailqlqe egklhmmkekwwrgngcpepr
>2xxrA (A:) slivttileepyvlfkksdkplygndrfegycidllrelstilgftyeirlvedgkygaq ddvngqwngmvrelidhkadlavaplaityvrekvidfskpfmtlgisilyrkgtpidsa ddlakqtkieygavedgatmtffkkskistydkmwafmssrrqsvlvksneegiqrvlts dyaflmesttiefvtqrncnltqigglidskgygvgtpmgspyrdkitiailqlqeegkl hmmkekww
>2xxrB (B:) gsnrslivttileepyvlfkksdkplygndrfegycidllrelstilgftyeirlvedgk ygaqddvngqwngmvrelidhkadlavaplaityvrekvidfskpfmtlgisilyrkgtp idsaddlakqtkieygavedgatmtffkkskistydkmwafmssrrqsvlvksneegiqr vltsdyaflmesttiefvtqrncnltqigglidskgygvgtpmgspyrdkitiailqlqe egklhmmkekwwrgngcpepr
>2xxrB (B:) slivttileepyvlfkksdkplygndrfegycidllrelstilgftyeirlvedgkygaq ddvngqwngmvrelidhkadlavaplaityvrekvidfskpfmtlgisilyrkgtpidsa ddlakqtkieygavedgatmtffkkskistydkmwafmssrrqsvlvksneegiqrvlts dyaflmesttiefvtqrncnltqigglidskgygvgtpmgspyrdkitiailqlqeegkl hmmkekwwr