Fig2c. Copyright: This image is from [doi:10.1002/aja.1002040102] Colbert MC; Rubin WW; Linney E; LaMantia AS, "Retinoid signaling and the generation of regional and cellular diversity in the embryonic mouse spinal cord." Dev Dyn 1995 Sep;204(1):1-12. Reprinted with permission of Wiley-Liss Inc. [PMID:8563020] .