Chains and heterogens:
PDB Chain Sequences:
>2xybA (A:) aigpvadltltnaqvspdgfareavvvngitpaplitgnkgdrfqlnvidqltnhtmlkt ssihwhgffqqgtnwadgpafvnqcpiasghsflydfqvpdqagtfwyhshlstqycdgl rgpfvvydpndphaslydidnddtvitladwyhvaaklgprfpfgsdstlinglgrttgi apsdlavikvtqgkryrfrlvslscdpnhtfsidnhtmtiieadsintqplevdsiqifa aqrysfvldasqpvdnywiranpafgntgfagginsailrydgapeieptsvqttptkpl nevdlhplspmpvpgspepggvdkplnlvfnfngtnffindhtfvppsvpvllqilsgaq aaqdlvpegsvfvlpsnssieisfpatanapgfphpfhlhghafavvrsagssvynydnp ifrdvvstgqpgdnvtirfetnnpgpwflhchidfhldagfavvmaedtpdtkaanpvpq awsdlcpiydaldpsdl