Models, Molecular, Protein Conformation, alpha-Helical, Protein Folding, Thioredoxin-Disulfide Reductase, Protein Conformation, Rossmann fold, Gene Expression, Crystallography, X-Ray, Cyanobacteria, Substrate Specificity, Bacterial Proteins, Models, flavoprotein, Protein Interaction Domains and Motifs, Amino Acid Sequence, Disulfides, redox active disulfide, sulfhydryl, Structural Homology, Crystallography, Binding Sites, Protein, alpha-Helical, Cell Membrane, Synechocystis, Molecular, transfer of reducing equivalents, Recombinant Proteins, Flavoprotein, Kinetics, Redox active disulfide, Structural Homology, Protein, Transfer of reducing equivalents, X-Ray, Biocatalysis, Flavin-Adenine Dinucleotide, beta-Strand, Protein Conformation, beta-Strand, Sulfhydry, Oxidoreductases, Sequence Alignment, Protein Binding