1. 3) A. Bhattacharya, J. R. Durrwachter, and G. N. Mott, Japan Kokai Tokkyo Koho, 9370415 (Mar. 23, 1993).
2. 20) T. Maniatis, E. F. Fritsch, and J. Sambrook, “Molecular cloning: Laboratory Manual”, Cold Spring Harbor Laboratory Press, Cold Spring Harbor, N. Y., 1982, p. 440.