Table 3.

Cell wall polymers, the MAbs that target them, their reported properties and the supporting references.

Cell wall polymer		MAbs	Wall properties	References
HG Pectin	Esterified	JIM7 , LM20	Porosity and permeability Expansibility Elasticity	36,37,38
	De-esterified	LM19, JIM5	Ca2+ binding Rigidity Resistance to mechanical stress Cell-to-cell adhesion	37,39,38
RG-I Pectin	Arabinan	LM13, LM6*	Spatial buffer Flexibility Expansibility and elasticity Porosity to wall Increases water holding capacity Signaling	37,40,41,39
	Galactan	LM5	Rigidity Tip growth	40,37
Hemicellulose	Xyloglucan	LM15, LM25	Regulates expansibility and yield threshold Cell-to-cell adhesion Cross-linkage/ tethering Nutrient source Sexual reproduction	36,42,43,44,45, 46
	Mannan	LM21	Anchoring Interacts with soil particles, microorganisms Nutrient uptake Hydrated/de-hydrated cycles Cross-links with cellulose Nutrient source	47,48,49,50
AGP		JIM13, JIM8, LM2, LM6*	Development Cell identity Structural integrity to walls Galactan turnover Ca2+ regulation/signal transduction Plasticity — unidirectional deformation Desiccation tolerance Membrane integrity Tip growth Sexual reproduction	51,40,52,53,46,55
Extensin		JIM12	Cell wall assembly and growth Tip growth Cell wall/cytoplasm communication	56,57,58,59
Callose		Anticallose	Stress response Sieve plate/ sieve areas Scaffolding for cell plate formation Plasmodesmata Developmental processes Tip growth/ Pollen tube Spore wall development/structure Sperm cell differentiation Desiccation tolerance	60,61,62,63,64, 65,66,67,68,69, 70,71,72,73

^*LM6 detects arabinan sidechains in both AGPs and pectin.