The position of two mutations in C4 protein and disease symptoms in <i>N. benthamiana</i> and Arabidopsis infected by BSCTV C4 mutants.

<p>(A) Amino acid sequences of C4 and two C4 mutants created by nucleotide substitution (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0011280#s4" target="_blank">materials and methods</a>). Numbers indicate the position of the first and the last amino acid. (B) <i>N. benthamiana</i> plants infected with wild-type and C4 mutated BSCTV two weeks after agro-inoculation. (C) Arabidopsis plants infected with wild-type and C4 mutated BSCTV two weeks after agro-inoculation. a shows 20 plants infected with wild-type, BSCTV-m1 and BSCTV-m2 respectively. b, c, d shows the individual plant infected with wild-type, BSCTV-m1 and BSCTV-m2 respectively.