Chains and heterogens:
PDB Chain Sequences:
>1gr2A (A:) ktvvvttilespyvmmkknhemlegneryegycvdlaaeiakhcgfkykltivgdgkyga rdadtkiwngmvgelvygkadiaiapltitlvreevidfskpfmslgisimikkpgtdgn piesaedlskqteiaygtldsgstkeffrrskiavfdkmwtymrsaepsvfvrttaegva rvrkskgkyayllestmneyieqrkpcdtmkvggnldskgygiatpkgsslgnavnlavl klneqglldklknkwwydkgec
>1gr2A (A:) ktvvvttilespyvmmkkmlegneryegycvdlaaeiakhcgfkykltivgdgkygarda dtkiwngmvgelvygkadiaiapltitlvreevidfskpfmslgisimikesaedlskqt eiaygtldsgstkeffrrskiavfdkmwtymrsaepsvfvrttaegvarvrkskgkyayl lestmneyieqrkpcdtmkvggnldskgygiatpkgsslgnavnlavlklneqglldklk nkwwydkgec