Chains and heterogens:
PDB Chain Sequences:
>3tv2A (A:) rmerdtfgeiavpaarlwgaqtqrslqnfkistekqspelihalalikraaaavnlelgv laqdkanaivaaadeiiagrhadefplavwqtgsgtqtnmnlnevianrasellggerge sravhpnddvnrgqssndvfptamhiaaaraivdhllpalrtlratldakaaafadivki grthlqdatpltlgqefsgyvaqldqgirhveaalphlyelaqggtavgtglnahpkfaa gvaaeigrltglpfvsapnkfevmaaadalvfahgalktvaaslmkiandirwlasgprc glgelsipenepgssimpgkvnptqseavtmlccqvfgndvavnfggasgnfelnvfrpm iahnvlqsvrlladgaqgfndhcavgiepnraridallneslmlvtalnphigydkaaqi akkahkegttlkaaalalgyvtdaqfdewvrpehmvgnr
>3tv2A (A:) rmerdtfgeiavpaarlwgaqtqrslqnfkistekqspelihalalikraaaavnlelgv laqdkanaivaaadeiiagrhadefplavwqtgsgtqtnmnlnevianrasellggerge sravhpnddvnrgqssndvfptamhiaaaraivdhllpalrtlratldakaaafadivki grthlqdatpltlgqefsgyvaqldqgirhveaalphlyelaqggtavgtglnahpkfaa gvaaeigrltglpfvsapnkfevmaaadalvfahgalktvaaslmkiandirwlasgprc glgelsipenepgssimpgkvnptqseavtmlccqvfgndvavnfggasgnfelnvfrpm iahnvlqsvrlladgaqgfndhcavgiepnraridallneslmlvtalnphigydkaaqi akkahkegttlkaaalalgyvtdaqfdewvrpehmvg