Molecular Cloning and Expression of Prohormone Convertases PC1 and PC2 in the Pituitary Gland of the Bullfrog, Rana catesbeiana Yaoi, Yuichi and Suzuki, Masakazu and Tomura, Hideaki and Kikuyama, Sakae and Tanaka, Shigeyasu, Zoological Science, 20, 1139-1151 (2003), DOI:http://dx.doi.org/10.2108/zsj.20.1139