research Differential expression of retinoic acid-synthesizing (RALDH) enzymes during fetal development and organ differentiation in the mouse 232 citations , January 2002 in “Mechanisms of development” Different enzymes are active in different parts of developing mouse organs.
research Immunolocalization of Enzymes, Binding Proteins, and Receptors Sufficient for Retinoic Acid Synthesis and Signaling During the Hair Cycle 48 citations , March 2007 in “The journal of investigative dermatology/Journal of investigative dermatology” Retinoic acid production and signaling in hair follicles are regulated by location and timing, affecting hair growth and cycling.