- ppNPY—Guinea Pig
- M. Krauss, K. Langnaese, K. Richter, I. Brunk, M. Wieske, G. Ahnert-Hilger, R. W. Veh, G. Laube. (2006). Spermidine synthase is prominently expressed in the striatal patch compartment and in putative interneurones of the matrix compartment. Journal of Neurochemistry, 97 (1), 174–189. doi: 10.1111/j.1471-4159.2006.03721.x