PAD4 (source code)
= PAD4
{c}
<PAD4>, PHYTOALEXIN DEFICIENT 4, is a <plant immunity> signaling component that interacts with <EDS1>. Their coupled activity helps connect immune recognition to downstream responses; <PAD4> is not itself the generic name of a pathogen-recognition <receptor>.
Comparative analyses found repeated joint losses of the <EDS1>-<PAD4> pathway and associated <genes> in several <plant> lineages. This makes pathway composition an evolutionary question: absence of one component can be informative about the others.<EDS1 and PAD4 pathway-loss study by Erin L. Baggs and others>[Abstract, lineage-associated losses]{ref}
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