Effect of C-terminal deletions on NtMYBAS1 trans-activation of PAL genes. a, The NtmybAS1 cDNAs containing deleted regions, as indicated by numbers of amino acid residues, were inserted between the CaMV 35S promoter and the NOS terminator. Effector plasmids were cotransfected into tobacco leaf protoplasts with reporter plasmids, containing gPAL1 and PALA, respectively. b, Transfection and assay of the reporter activity are as in Figure 9. The error bars represent the se (n > 10).