Chloroplasts/metabolism; Peroxidases/metabolism; Thioredoxins/chemistry; Thioredoxins/metabolism; Amino Acid Sequence; Amino Acid Substitution; Arabidopsis/metabolism; Binding Sites; Cloning, Molecular; Cyclophilins/chemistry; Cyclophilins/metabolism; Cysteine; Disulfides/analysis; Glutamate-Ammonia Ligase/chemistry; Glutamate-Ammonia Ligase/metabolism; Glyceraldehyde-3-Phosphate Dehydrogenases/chemistry; Glyceraldehyde-3-Phosphate Dehydrogenases/metabolism; Kinetics; Models, Molecular; Molecular Sequence Data; Mutagenesis, Site-Directed; Peroxidases/chemistry; Peroxiredoxins; Phosphoric Monoester Hydrolases/chemistry; Phosphoric Monoester Hydrolases/metabolism; Plant Proteins/chemistry; Plant Proteins/metabolism; Protein Structure, Secondary; Protein Subunits; Recombinant Proteins/chemistry; Recombinant Proteins/metabolism; Resins, Plant; Ribulose-Bisphosphate Carboxylase/metabolism; Serine; Spinacia oleracea/metabolism