CesA8 (IRX1) is a catalytic subunit of an enzyme involved in secondary cell wall biosynthesis - cellulose synthase trerminal complexes. It interacts with CESA4 and CESA7 which is required for a functyional complex. The protein is needed for xylem cell wall thickening. Occurs in secondary cell wall developing tissues such as xylems and interfascicular regions. Not expressed in leaves and not found in embryos. Synonymes: Protein IRREGULAR XYLEM 1, IRX1, Protein LEAF WILTING 2, LEW2 .
