May be required for the insertion of some integral membrane proteins into the chloroplast thylakoid membrane. May play a role in inhibiting senescence. Highly expressed in apical buds. Low levels of expression in leaves. Not expressed in roots, and stems. Expressed after flower initiation. By the plant hormone gibberellin A3. Expression is induced to a greater extent by short day conditions than long day conditions. Belongs to the OXA1/ALB3/YidC (TC 2.A.9.2) family.