Journal Article Plant Proteins Research Support, Non-U.S. Gov't 7440-44-0 Amino acid metabolism Carbon Cysteine and serine proteases HvNAM1 Lactones Lipids N762921K75 Nitrogen Plant Growth Regulators Protease Inhibitors Research Support, U.S. Gov't, Non-P.H.S. Review Serpins Transcription Factors barley (Hordeum vulgare L.) leaf senescence lipid metabolism molecular chaperone nitrogen remobilization photo-oxidative stress plant cell death protease serpin transcription factor