ALDH1A2 (Aldehyde Dehydrogenase 1 Family Member A2): ALDH1A2 is an enzyme belonging to the aldehyde dehydrogenase family that catalyses the oxidation of retinaldehyde to retinoic acid, the active form of vitamin A. This conversion is essential for developmental processes such as embryogenesis, tissue patterning and organ formation, as it regulates gene expression and cell differentiation through retinoic acid signalling. ALDH1A2 is highly expressed in developing tissues, including limb buds, the central nervous system and sensory organs.