1U19AstructureMNGTEGPNFYVPFSNKTGVVRSPFEAPQYYLAEPWQFSMLAAYMFLLIMLGFPINFLTLYVTVQHKKLRTPLNYILLNLAVADLFMVFGGFTTTLYTSLHGYFVFGPTGCNLEGFFATLGGEIALWSLVVLAIERYVVVCKPMS-NFRFGENHAIMGVAFTWVMALACAAPPLV-GWSRYI----PEGMQCSCGIDYYTP-HEETNNESFVIYMFVVHFIIPLIVIFFCYGQLVFTVKEAAAQQQESATTQKAEKEVTRMVIIMVIAFLICWLPYAGVAFYIFTHQGSDFGPIFMTIPAFFAKTSAVYNPVIYIMMNKQFRNCMVTTLCCGKNPLGDDEASTTVSKTETSQVAPA 1U19Amembrane contact???????????????????????????????????????TT?TTTTTTTTNTTTNTTNTHNHHHHHNNHNNNNHTNHTNNTNNTTTNTTTNTTNTHNHHHHHHNTHHTTNHTNNNTNNTNNNNNNTNTTTTTTTNHTNNHHNHH-NHHTHHHHNHTTTTTTTTTTTTTTTTTHH-HTNHHH----NNNHNNHHNNNNN??-NNNNNHHHHNTTNNTTNNTTTTTTTTTTTTHTTHHNHH?NHNNNNNNN??H?NHHNTHHTTTTTTTNTTTTTTNTTTNTTNTTHN?HHTHHHTNTTTNTTNNTTNTTNTTTHTH?HHHNHHNTHHTTH???????????????????NNNNNNN 1U19Amembrane layerTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTHTHHHHHHHHHHTTTTTTTTTTTTTTTTTTTTTTHHHHHHHHHHHHHHHHTTTTTTTTTTTTTTTTTTTTTTHHHHHHHHHHN-NHHHHHHTTTTTTTTTTTTTTTTTTTTTH-HHHHHN----NNNNNNNNNNNNNHH-HHHHHHHHTTTTTTTTTTTTTTTTTTTTTTHHHHHHHHHHNNNNNNNNHHHHHHHHHHHTTTTTTTTTTTTTTTTTTTTTHHHHHHHHHHHHTTTTTTTTTTTTTTTTTTTTTHHHHHHHHHTHHTTTTTTTTTTTTTTTTTHHHHHNNNNNNN templateAstructure-----------------------------------WEAGMSLLMALVVLLIVAGNVLVIAAIGSTQRLQTLTNLFITSLACADLVVGLLVVPFGATLVVRGTWLWGSFLCELWTSLDVLCVTASIETLCVIAIDRYLAITSPFRYQSLMTRARAKVIICTVWAISALVSFLPIMMHWWRDEDPQALKCYQDPG-------CCDFVTNRAYAIASSIISFYIPLLIMIFVALRVYREAKE-QI---------R-EHKALKTLGIIMGVFTLCWLPFFLVNIVNVFNR-DLVPDWLFVAFNWLGYANSAMNPIIYCR-SPDFRKAFKRLLA-------------------------- templateAmembrane contact-----------------------------------????TT?TTTTTTTTNTTTNTTNTHNHHHHHNNHNNNNHTNHTNNTNNTTTNTTTNTTNTHNHHHHHHNTHHTTNHTNNNTNNTNNNNNNTNTTTTTTTNHTNNHHNHHTNHHTHHHHNHTTTTTTTTTTTTTTTTTHHHHTNHHHHNNNNNNHNNHH-------NNNNNNHHHHNTTNNTTNNTTTTTTTTTTTTHTTHHNHH-NH---------H-NHHNTHHTTTTTTTNTTTTTTNTTTNTTNTTHN-HHTHHHTNTTTNTTNNTTNTTNTTTHTH-HHHNHHNTHHTTH-------------------------- templateAmembrane layer-----------------------------------TTTTTTTTTTTTTTTTTTTTTTTTTTHTHHHHHHHHHHTTTTTTTTTTTTTTTTTTTTTTHHHHHHHHHHHHHHHHTTTTTTTTTTTTTTTTTTTTTTHHHHHHHHHHHHHHHHHHHTTTTTTTTTTTTTTTTTTTTTHHHHHHHNNNNHNNNHNNHH-------HHHHHHHHHTTTTTTTTTTTTTTTTTTTTTTHHHHHHHH-HH---------H-HHHHHHTTTTTTTTTTTTTTTTTTTTTTHHHHH-HHHHHHTTTTTTTTTTTTTTTTTTTTTH-HHHHHHHTHHTTT--------------------------