Plays a role in the flow of nitrogen into nitrogenous organic compounds. MACLTDLVNLNLSDTTEKIIAEYIWIGGSGMDLRSKARTLSGPVTDPSKLPKWNYDGSSTGQAPGEDSEVILYPQAIFKDPFRRGNNILVMCDCYTPAGEPIPTNKRYNAAKIFSSPEVAAEEPWYGIEQEYTLLQKDTNWPLGWPIGGFPGPQGPYYCGIGAEKSFGRDIVDAHYKACLYAGINISGINGEVMPGQWEFQVGPSVGISSGDQVWVARYILERITEIAGVVVTFDPKPIPGDWNGAGAHTNYSTESMRKEGGYEVIKAAIEKLKLRHREHIAAYGEGNDGRLTGRHETADINTFSWGVANRGASVRVGRETEQNGKGYFEDRRPASNMDPYVVTSMIAETTIIWKP GLN4 Glutamate--ammonia ligase 356 GS112 GS1-3 GLNA3_MAIZE Glutamine synthetase root isozyme 3