A tandem of subtilisin‐like protease genes in tomato (P69A, P69B, P69C and P69D), also termed pathogenesis‐related PR‐P69 protease, exhibited a high similarity to each other and were involved in protein degradation against pathogen infection (Jorda et al., 1999; Tornero et al., 1997). The gene discussed is ICA1; the disease is infection.