1.4.1.2	glutamate dehydrogenase	companion cell	-	726245	
1.4.1.2	glutamate dehydrogenase	companion cell	all GDH genes are expressed in the mitochondria of the root companion cells	726164	
2.4.1.13	sucrose synthase	companion cell	-	736966	
2.4.1.13	sucrose synthase	companion cell	isoform SuSy1 is expressed exclusively in phloem companion cells	757335	
2.4.1.13	sucrose synthase	companion cell	isoform SuSy4 is expressed exclusively in phloem companion cells	757335	
2.7.9.4	alpha-glucan, water dikinase	companion cell	phloem, high expression just before onset of senescence (promoter activity)	693408	
4.1.1.49	phosphoenolpyruvate carboxykinase (ATP)	companion cell	the enzyme is present in the companion cells of the adaxial phloem of minor veins, the internal and external phloem of vascular bundles in petioles and stems, the phloem in roots and the eextra-fascicular phloem in leaves, cotyledons, petioles and stems	663186	
7.1.3.1	H+-exporting diphosphatase	companion cell	-	748977	
7.3.2.4	ABC-type nitrate transporter	companion cell	NRT1.9 is a transporter expressed in the companion cells of root phloem	720682	
7.3.2.4	ABC-type nitrate transporter	companion cell	NRT1.9 is expressed in the companion cells of the phloem	721094