Chains and heterogens:
PDB Chain Sequences:
>1b7eA (A:) mqegayrfirnpnvsaeairkagamqtvklaqefpellaiedttslsyrhqvaeelgklg siqdksrgwwvhsvllleattfrtvgllhqewwmrpddpadadekesgkwlaaaatsrlr mgsmmsnviavcdreadihaylqdklahnerfvvrskhprkdvesglylydhlknqpelg gyqisipqkgvvdkrgkrknrparkaslslrsgritlkqgnitlnavlaeeinppkgetp lkwllltsepveslaqalrvidiythrwrieefhkawktgagaerqrmeepdnlermvsi lsfvavrllqlresftlpqalraqgllkeaehvesqsaetvltpdecqllgyldkgkrkr kekgslqwaymaiarlggfmdskrtgiaswgalwegwealqskldgflaakdlmaqgiki
>1b7eA (A:) saeairkagamqtvklaqefpellaiedttslsyrwwvhsvllleattfrtvgllhqeww mrpddpadadekesgkwlaaaatsrlrmgsmmsnviavcdreadihaylqdklahnerfv vrskhprkdvesglylydhlknqpelggyqisipqkgvrparkaslslrsgritlkqgni tlnavlaeeinppkgetplkwllltsepveslaqalrvidiythrwrieefhkawktgag aerqrmpdnlermvsilsfvavrllqlresftlpqalraqgllkeaehvesqsaetvltp decqllgyldkgkrkrkekgslqwaymaiarlggfmdskrtgiaswgalwegwealqskl dgflaakdlmaq