Effects of S-adenosylmethionine decarboxylase, polyamines, amino acids, and weak bases (amines and ammonia) on development and ribosomal RNA synthesis in Xenopus embryos. অনুযায়ী Shiokawa, K, Aso, M, Kondo, T, Takai, J, Yoshida, J, Mishina, T, Fuchimukai, K, Ogasawara, T, Kariya, T, Tashiro, K, Igarashi, K