Chains and heterogens:
PDB Chain Sequences:
>1xtoA (A:) myiqvlgsaagggfpqwncncvnckgyrdgtlkatartqssialsddgvhwilcnaspdi raqlqafapmqparalrdtginaivlldsqidhttgllslregcphqvwctdmvhqdltt gfplfnmlshwngglqwnrielegsfvidacpnlkftpfplrsaappysphrfdphpgdn lglmvedtrtggklfyapglgqvdekllammhgadcllvdgtlweddemqrrgvgtrtgr emghlaqngpggmlevldgfprqrkvlihinntnpildensperaevlrrgvevafdgms iellehhhhhh
>1xtoA (A:) myiqvlgsaagggfpqwncncvnckgyrdgtlkatartqssialsddgvhwilcnaspdi raqlqafapmqparalrdtginaivlldsqidhttgllslregcphqvwctdmvhqdltt gfplfnmlshwngglqwnrielegsfvidacpnlkftpfplrsaappysphrfdphpgdn lglmvedtrtggklfyapglgqvdekllammhgadcllvdgtlweddemqrrgvgtrtgr emghlaqngpggmlevldgfprqrkvlihinntnpildensperaevlrrgvevafdgms iell