Chains and heterogens:
PDB Chain Sequences:
>1k4kA (A:) mkslqalfggtfdpvhyghlkpvetlanligltrvtiipnnvpphrpqpeansvqrkhml elaiadkplftlderelkrnapsytaqtlkewrqeqgpdvplafiigqdslltfptwyey etildnahlivcrrpgyplemaqpqyqqwledhlthnpedlhlqpagkiylaetpwfnis atiirerlqngescedllpepvltyinqqglyr
>1k4kB (B:) mkslqalfggtfdpvhyghlkpvetlanligltrvtiipnnvpphrpqpeansvqrkhml elaiadkplftlderelkrnapsytaqtlkewrqeqgpdvplafiigqdslltfptwyey etildnahlivcrrpgyplemaqpqyqqwledhlthnpedlhlqpagkiylaetpwfnis atiirerlqngescedllpepvltyinqqglyr
>1k4kB (B:) mkslqalfggtfdpvhyghlkpvetlanligltrvtiipnnvpphrpqpeansvqrkhml elaiadkplftlderelkrnapsytaqtlkewrqeqgpdvplafiigqdsletildnahl ivcrrpgyplemaqpqyqqwledhlthnpedlhlqpagkiylaetpwfnisatiirerlq ngescedllpepvltyinqqglyr
>1k4kC (C:) mkslqalfggtfdpvhyghlkpvetlanligltrvtiipnnvpphrpqpeansvqrkhml elaiadkplftlderelkrnapsytaqtlkewrqeqgpdvplafiigqdslltfptwyey etildnahlivcrrpgyplemaqpqyqqwledhlthnpedlhlqpagkiylaetpwfnis atiirerlqngescedllpepvltyinqqglyr
>1k4kD (D:) mkslqalfggtfdpvhyghlkpvetlanligltrvtiipnnvpphrpqpeansvqrkhml elaiadkplftlderelkrnapsytaqtlkewrqeqgpdvplafiigqdslltfptwyey etildnahlivcrrpgyplemaqpqyqqwledhlthnpedlhlqpagkiylaetpwfnis atiirerlqngescedllpepvltyinqqglyr
>1k4kD (D:) mkslqalfggtfdpvhyghlkpvetlanligltrvtiipnnvpphrpqpeansvqrkhml elaiadkplftlderelkrnapsytaqtlkewrqeqgpdvplafiigqdslltfptwyey etildnahlivcrrpgyplemaqpqyqqwledhlthnpedlhlqpagkiylaetpwfnis atiirerlqngescedllpepvltyinqqgly