CP and infection: These molecules, including termicin [3,21,22], prolixicin [23], thaumatin-like protein [24–26], lysozyme [27], cathepsin, asparaginyl endopeptidase-like cysteine peptidase (AE-like CP), and metacaspase-like cysteine peptidase (MCA-like CP) [5,28,29], are upregulated upon pathogenic infection, and they directly attack pathogens.