Chains and heterogens:
PDB Chain Sequences:
>1k7dA (A:) aeqssseikivrdeygmphiyandtwhlfygygyvvaqdrlfqmemarrstqgtvaevlg kdfvkfdkdirrnywpdairaqiaalspedmsilqgyadgmnawidkvntnpetllpkqf ntfgftpkrwepfdvamifvgtmanrfsdstseidnlalltalkdkygvsqgmavfnqlk wlvnpsapttiavqesnyplkfnqqnsqt
>1k7dA (A:) ssseikivrdeygmphiyandtwhlfygygyvvaqdrlfqmemarrstqgtvaevlgkdf vkfdkdirrnywpdairaqiaalspedmsilqgyadgmnawidkvntnpetllpkqfntf gftpkrwepfdvamifvgtmanrfsdstseidnlalltalkdkygvsqgmavfnqlkwlv npsapttiavqesnyplkfnqqnsqt
>1k7dB (B:) snmwvigkskaqdakaimvngpqfgwyapaytygiglhgagydvtgntpfaypglvfghn gviswgstagfgddvdifaerlsaekpgyylhngkwvkmlsreetitvkngqaetftvwr tvhgnilqtdqttqtayaksrawdgkevasllawthqmkaknwqewtqqaakqaltinwy yadvngnigyvhtgaypdrqsghdprlpvpgtgkwdwkgllpfemnpkvynpqsgyianw nnspqkdypasdlfaflwggadrvteidrlleqkprltadqawdvirqtsrqdlnlrlfl ptlqaatsgltqsdprrqlvetltrwdginllnddgktwqqpgsailnvwltsmlkrtvv aavpmpfdkwysasgyettqdgptgslnisvgakilyeavqgdkspipqavdlfagkpqq evvlaaledtwetlskrygnnvsnwktpamaltfrannffgvpqaaaeetrhqaeyqnrg tendmivfspttsdrpvlawdvvapgqsgfiapdgtvdkhyedqlkmyenfgrkslwltk qdveahkesqevlhvqr