Chains and heterogens:
PDB Chain Sequences:
>2iy3A (A:) mfqqlsarlqeaigrlrgrgriteedlkatlreirralmdadvnlevardfvervreeal gkqvlesltpaevilatvyealkealggearlpvlkdrnlwflvglqgsgktttaaklal yykgkgrrpllvaadtqrpaareqlrllgekvgvpvlevmdgespesirrrveekarlea rdlilvdtagrlqideplmgelarlkevlgpdevllvldamtgqealsvarafdekvgvt glvltkldgdarggaalsarhvtgkpiyfagvsekpeglepfyperlagrilgmgdiesi lekvkgleeydkiqkkmedvmegkgkltlrdvyaqiialrkmgplskvlqhipglgimlp tpsedqlkigeekirrwlaalnsmtykelenpniidksrmrriaegsgleveevrellew ynnmnrllkmvk