Chains and heterogens:
PDB Chain Sequences:
>1niuA (A:) mndfhrdtwaevdldaiydnvenlrrllpddthimavvkanayghgdvqvartaleagas rlavafldealalrekgieapilvlgasrpadaalaaqqrialtvfrsdwleeasalysg pfpihfhlkmdtgmgrlgvkdeeetkrivalierhphfvleglythfatadevntdyfsy qytrflhmlewlpsrpplvhcansaaslrfpdrtfnmvrfgiamyglapspgikpllpyp lkeafslhsrlvhvkklqpgekvsygatytaqteewigtipigyadgwlrrlqhfhvlvd gqkapivgricmdqcmirlpgplpvgtkvtligrqgdevisiddvarhletinyevpcti syrvpriffrhkrimevrnaigrgessa
>1niuA (A:) ndfhrdtwaevdldaiydnvenlrrllpddthimavvkanayghgdvqvartaleagasr lavafldealalrekgieapilvlgasrpadaalaaqqrialtvfrsdwleeasalysgp fpihfhlkmdtgmgrlgvkdeeetkrivalierhphfvleglythfatadevntdyfsyq ytrflhmlewlpsrpplvhcansaaslrfpdrtfnmvrfgiamyglapspgikpllpypl keafslhsrlvhvkklqpgekvsygatytaqteewigtipigyadgwlrrlqhfhvlvdg qkapivgricmdqcmirlpgplpvgtkvtligrqgdevisiddvarhletinyevpctis yrvpriffrhkrimevrnaigr
>1niuB (B:) mndfhrdtwaevdldaiydnvenlrrllpddthimavvkanayghgdvqvartaleagas rlavafldealalrekgieapilvlgasrpadaalaaqqrialtvfrsdwleeasalysg pfpihfhlkmdtgmgrlgvkdeeetkrivalierhphfvleglythfatadevntdyfsy qytrflhmlewlpsrpplvhcansaaslrfpdrtfnmvrfgiamyglapspgikpllpyp lkeafslhsrlvhvkklqpgekvsygatytaqteewigtipigyadgwlrrlqhfhvlvd gqkapivgricmdqcmirlpgplpvgtkvtligrqgdevisiddvarhletinyevpcti syrvpriffrhkrimevrnaigrgessa
>1niuB (B:) ndfhrdtwaevdldaiydnvenlrrllpddthimavvkanayghgdvqvartaleagasr lavafldealalrekgieapilvlgasrpadaalaaqqrialtvfrsdwleeasalysgp fpihfhlkmdtgmgrlgvkdeeetkrivalierhphfvleglythfatadevntdyfsyq ytrflhmlewlpsrpplvhcansaaslrfpdrtfnmvrfgiamyglapspgikpllpypl keafslhsrlvhvkklqpgekvsygatytaqteewigtipigyadgwlrrlqhfhvlvdg qkapivgricmdqcmirlpgplpvgtkvtligrqgdevisiddvarhletinyevpctis yrvpriffrhkrimevrnai