Glossary of The Cell (5th ed.) by Alberts et al. (2008)
- In yolky eggs, the end of opposite the yolk. Cells derived from the animal region will envelope those derived from the yolky (vegetal) region.
- Alberts, B., Johnson, A., Lewis, J. Raff, M., Roberts, K. & Walter P. 2008. Molecular Biology of the Cell, 5th ed. -xxxiv + 1616 pp. Garland Science, New York.