... 5 Molecular Biology of Secondary Metabolism 103Kinjo, J., Yokomizo, K., Hirakawa, T., Shii, Y., Nohara, ... Acad. Sci. USA 91: 3564–3568.Morita, M., Shibuya, M., Kushiro, T., Masuda, K., Ebizuka, Y. 2000. Molecular cloning and func-tional expression of triterpene synthases from pea (Pisum sativum): ... decreases thetransition temperature to about 0◦C, providing the membrane lipids with enhanced molecular motions at low temperatures. Plant chloroplasts have a soluble desat-urase that introduces...