Chains and heterogens:
PDB Chain Sequences:
>1xr6A (A:) gqikiskhanecglptihtpsktklqpsvfydvfpgskepavltdndprlkvnfkealfs kykgntecslnqhmeiaiahysaqlitldidskpialedsvfgieglealdlntsagfpy vtmgikkrdlinnktkdisrlkealdkygvdlpmitflkdelrkkekisagktrvieass indtilfrttfgnlfskfhlnpgvvtgsavgcdpetfwskipvmldgdcimafdytnydg sihpvwfqalkkvlenlsfqsnlidrlcyskhlfkstyyevaggvpsgcsgtsifntmin niiirtlvldayknidldklkiiaygddvifsykytldmeaianegkkygltitpadkst efkkldynnvtflkrgfkqdekhtflihptfpveeiyesirwtkkpsqmqehvlslchlm whngrkvyedfsskirsvsagralyippydllkhewyekf