Chains and heterogens:
PDB Chain Sequences:
>4r3dA (A:) gplgsqqltievlvtvdgvnfrtvvlnnkntyrsqlgcvffngadisdtipdekqnghsl yladnltadetkalkelygpvdptflhrfyslkaavhkwkmvvcdkvrslklsdnncyln avimtldllkdikfvipalqhafmkhkggdstdfialimaygnctfgapddasrllhtvl akaelccsarmvwrewcnvcgikdvvlqglkaccyvgvqtvedlrarmtyvcqcggerhr qivehttpwlllsgtpneklvttstapdfvafnvfqgietavghyvharlkgglilkfds gtvsktsdwkckvtdvlfpgqkyssdcnvvrysldg
>4r3dA (A:) ltievlvtvdgvnfrtvvlnnkntyrsqlgcvffngadisdtipdekqnghslyladnlt adetkalkelygpvdptflhrfyslkaavhkwkmvvcdkvrslklsdnncylnavimtld llkdikfvipalqhafmkhkggdstdfialimaygnctfgapddasrllhtvlakaelcc sarmvwrewcnvcgikdvvlqglkaccyvgvqtvedlrarmtyvcqcggerhrqivehtt pwlllsgtpneklvttstapdfvafnvfqgghyvharlkgglilkfdsgtvsktsdwkck vtdvlfpgqkyssdcnvvr
>4r3dB (B:) gplgsqqltievlvtvdgvnfrtvvlnnkntyrsqlgcvffngadisdtipdekqnghsl yladnltadetkalkelygpvdptflhrfyslkaavhkwkmvvcdkvrslklsdnncyln avimtldllkdikfvipalqhafmkhkggdstdfialimaygnctfgapddasrllhtvl akaelccsarmvwrewcnvcgikdvvlqglkaccyvgvqtvedlrarmtyvcqcggerhr qivehttpwlllsgtpneklvttstapdfvafnvfqgietavghyvharlkgglilkfds gtvsktsdwkckvtdvlfpgqkyssdcnvvrysldg
>4r3dB (B:) ltievlvtvdgvnfrtvvlnnkntyrsqlgcvffngadisdtipdekqnghslyladnlt adetkalkelygpvdptflhrfyslkaavhkwkmvvcdkvrslklsdnncylnavimtld llkdikfvipalqhafmkhkggdstdfialimaygnctfgapddasrllhtvlakaelcc sarmvwrewcnvcgikdvvlqglkaccyvgvqtvedlrarmtyvcqcggerhrqivehtt pwlllsgtpneklvttstapdfvafnvfqgvghyvharlkgglilkfdsgtvsktsdwkc kvtdvlfpgqkyssdcnvvr