Amino Acid Motifs 1 Antiporters 1 Article 1 Computational Biology 1 Databases, Protein 1 Evolution, Molecular 1 Phylogeny 1 Protein Conformation 1 antiporter 1 biology 1 chemistry 1 genetics 1 membrane protein 1 metabolism 1 molecular evolution 1 monovalent cation 1 monovalent cation proton antiporter 1 phylogeny 1 protein conformation 1 protein database 1 protein domain 1 protein family 1 protein folding 1 protein localization 1 protein motif 1 protein structure 1 proton 1 slipknot motif 1 unclassified drug 1 unknotted motif