Schematic diagram of CMV-Fny- and CMV-P1-derived amino acid substitution mutants.

<p>The positions of the amino acid substitutions are located at the top of each amino acid sequence. Fny- and P1-derived amino acids are indicated in blue and red, respectively. At 21 days post-inoculation, accumulation of CMV was detected by ELISA. +, presence of virus; −, absence of virus; R, resistant; S, susceptible.