Function
The RLP42 antibody recognizes fungal endopolygalacturonases (PGs), such as those produced by *Botrytis cinerea* (BcPG3, BcPG2, BcPG4, BcPG6) and *Aspergillus niger* (AnPGB). These PGs are enzymes involved in fungal pathogenesis. RLP42 acts as a microbe-associated molecular pattern (MAMP) receptor, triggering defense responses against fungal pathogens like *B. cinerea* and oomycetes like *Hyaloperonospora arabidopsidis*. The functionality of RLP42 appears to be dependent on the presence of the receptor kinase SOBIR1, which acts as an adapter protein in this signaling pathway.