Chains and heterogens:
PDB Chain Sequences:
>1ai7A (A:) eqssseikivrdeygmphiyandtwhlfygygyvvaqdrlfqmemarrstqgtvaevlgk dfvkfdkdirrnywpdairaqiaalspedmsilqgyadgmnawidkvntnpetllpkqfn tfgftpkrwepfdvamifvgtmanrfsdstseidnlalltalkdkygvsqgmavfnqlkw lvnpsapttiavqesnyplkfnqqnsqta
>1ai7A (A:) ssseikivrdeygmphiyandtwhlfygygyvvaqdrlfqmemarrstqgtvaevlgkdf vkfdkdirrnywpdairaqiaalspedmsilqgyadgmnawidkvntnpetllpkqfntf gftpkrwepfdvamifvgtmanrfsdstseidnlalltalkdkygvsqgmavfnqlkwlv npsapttiavqesnyplkfnqqnsqt
>1ai7B (B:) snmwvigkskaqdakaimvngpqfgwyapaytygiglhgagydvtgntpfaypglvfghn gviswgstagfgddvdifaerlsaekpgyylhngkwvkmlsreetitvkngqaetftvwr tvhgnilqtdqttqtayaksrawdgkevasllawthqmkaknwqqwtqqaakqaltinwy yadvngnigyvhtgaypdrqsghdprlpvpgtgkwdwkgllpfemnpkvynpqsgyianw nnspqkdypasdlfaflwggadrvteidrlleqkprltadqawdvirqtsrqdlnlrlfl ptlqaatsgltqsdprrqlvetltrwdginllnddgktwqqpgsailnvwltsmlkrtvv aavpmpfdkwysasgyettqdgptgslnisvgakilyeavqgdkspipqavdlfagkpqq evvlaaledtwetlskrygnnvsnwktpamaltfrannffgvpqaaaeetrhqaeyqnrg tendmivfspttsdrpvlawdvvapgqsgfiapdgtvdkhyedqlkmyenfgrkslwltk qdveahkesqevlhvqr