Chains and heterogens:
PDB Chain Sequences:
>1urvA (A:) mekvpgemeierrerseelseaerkavqamwarlyansedvgvailvrffvnfpsakqyf sqfkhmedplemerspqlrkhasrvmgalntvvenlhdpdkvssvlalvgkahalkhkve pvyfkilsgvilevvaeefasdfppetqrawaklrgliyshvtaaykevgwvqqvpnatt ppatlpssgp
>1urvA (A:) elseaerkavqamwarlyansedvgvailvrffvnfpsakqyfsqfkhmedplemerspq lrkhasrvmgalntvvenlhdpdkvssvlalvgkahalkhkvepvyfkilsgvilevvae efasdfppetqrawaklrgliyshvtaaykevgw
>1urvB (B:) mekvpgemeierrerseelseaerkavqamwarlyansedvgvailvrffvnfpsakqyf sqfkhmedplemerspqlrkhasrvmgalntvvenlhdpdkvssvlalvgkahalkhkve pvyfkilsgvilevvaeefasdfppetqrawaklrgliyshvtaaykevgwvqqvpnatt ppatlpssgp
>1urvB (B:) elseaerkavqamwarlyansedvgvailvrffvnfpsakqyfsqfkhmedplemerspq lrkhasrvmgalntvvenlhdpdkvssvlalvgkahalkhkvepvyfkilsgvilevvae efasdfppetqrawaklrgliyshvtaaykevgw