Fig. 2: NO-dependent posttranslational modifications in plants.
From: Molecular functions of nitric oxide and its potential applications in horticultural crops
S-nitrosation, the covalent and reversible attachment of NO to a reactive thiol group of cysteine forming an S-nitrosothiol. Metal S-nitrosylation, in which an NO radical donates electrons and therefore reacts with transition metals. Tyrosine nitration is mediated by ONOO−, an NO-derived species, resulting in the formation of a 3-nitrotyrosine residue. Nitration of unsaturated fatty acids forms nitro-fatty acids. All these processes except nitration are assumed to be reversible in plants. The dotted arrows indicate that all the products generated can release NO in plant cells
