This is an early access version, the complete PDF, HTML, and XML versions will be available soon. Open AccessArticle by Sergei V. Beliakov †, Victor Blokhin †, Sergey A. Surkov and Michael V. Ugrumov * Laboratory of Neural and Neuroendocrine Regulations, Koltzov Institute of Developmental Biology of the Russian Academy of Sciences, 119334 Moscow, Russia * Author to whom correspondence should be addressed. † These authors contributed equally to this work. Int. J. Mol. Sci.