Table 1. Selected DAMPs and corresponding molecules in plant damaged-self recognition.

DAMP in human immune response	Reference	Damaged-self signal in plants	Reference
Extracellular* ATP	24,25	Extracellular ATP	2,37,38
Extracellular Adenosine	39,40	n.d.
Extracellular RNA	24,25	n.d.
Extracellular DNA	24,25	Extracellular DNA	41
HMGB1 (protein)	42,43	n.d.
Histones	26	n.d.
Components released from the extracellular matrix (soluble biglycan or fibrinogen)	25,28,44	Cell wall-derived pectines, oligogalacturonide fragments and oligosaccharides	10-12
Protein fragments (of, e.g., collagen or fibronectin)	45,46	Protein fragments (systemin, signaling peptides)	6-9,47

^*In the context of this table, ‘extracellular’ refers explicitly to extracellular, but endogenous (that is, released from cells of the same individual) molecules; n.d., not determined