- Ribozymes targeted to stearoyl-ACP delta9 desaturase mRNA produce heritable increases of stearic acid in transgenic maize leaves. Merlo, A.O., Cowen, N., Delate, T., Edington, B., Folkerts, O., Hopkins, N., Lemeiux, C., Skokut, T., Smith, K., Woosley, A., Yang, Y., Young, S., Zwick, M. Plant Cell (1998)