Gene expression of cellulase and xylanase in tobacco and cell wall digestion by domain-shuffled enzymes K. Ohmiya, J-L Sun, S. Karita, T. Kawazu, T. Kimura and K. Sakka Reprod. Nutr. Dev., 37 Suppl. 1 (1997) 53-54 DOI: 10.1051/rnd:19970734