Alternative splicing and mitochondrial import: Kubo, N., Harada, K., Hirai, A. and Kadowaki, K-I. (1999) A single nuclear transcript encoding mitochondrial RPS14 and SDHB of rice is processed by alternative splicing: common use of the same mitochondrial targeting signal for different proteins, Proc. Natl. Acad. Sci. U. S. A. 96, 9207–9211