RT Journal A1 Mitka M T1 FEtal alcohol clues JF JAMA JO JAMA YR 2009 FD June 3 VO 301 IS 21 SP 2202 OP 2202 DO 10.1001/jama.2009.758 UL http://dx.doi.org/10.1001/jama.2009.758 AB Previously, scientists had discovered that exposing a frog embryo to alcohol during gastrulation reduces retinoic acid (RA) signaling (which is required for normal embryogenesis) and can result in the abnormalities associated with the disorder. Researchers theorized that alcohol exerts this effect on RA through the enzyme retinaldehyde dehydrogenase 2 (RALDH2), which appears in vertebrate embryos at the onset of gastrulation and is involved in metabolizing vitamin A to RA.