Journal Article N762921K75 Nitrogen Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. nitrogen use efficiency 344S277G0Z 52500-60-4 Allantoin Allantoin and allantoate partitioning Assimilate partitioning Catalytic activity Development Gene expression Gene knockout Homoeologs Membrane Transport Proteins Redox regulation Thioredoxins carbon and nitrogen assimilation co-expression flag leaf metabolism gene expression genome nitrogen recycling and remobilization photosynthesis phylogeny proteome source and sink source to sink transport