Species	Reference gene ID	Possible function	Papers / DOI
Arabidopsis	At1g62770	Pectin methylesterase (PME) inhibitor that probably targets root-expressed PME and PME3 in a moderate pH-dependent manner, mainly in slightly acidic conditions (pH 6.3 and 5.0) and to some extent at pH 7.5.	Combined Experimental and Computational Approaches Reveal Distinct pH Dependence of Pectin Methylesterase Inhibitors.; 2017; DOI: 10.1104/pp.16.01790; PMID: 28034952; https://pubmed.ncbi.nlm.nih.gov/28034952/
Arabidopsis	At4g25260	Pectin methylesterase (PME) inhibitor that can target PME3 in a pH-dependent manner, mainly in slightly acidic conditions (pH 6.0 and 5.0) but not at pH 7.0.	Tuning of Pectin Methylesterification: PECTIN METHYLESTERASE INHIBITOR 7 MODULATES THE PROCESSIVE ACTIVITY OF CO-EXPRESSED PECTIN METHYLESTERASE 3 IN A pH-DEPENDENT MANNER.; 2015; DOI: 10.1074/jbc.m115.639534; PMID: 26183897; https://pubmed.ncbi.nlm.nih.gov/26183897/ | Structural and dynamical characterization of the pH-dependence of the pectin methylesterase-pectin methylesterase inhibitor complex.; 2017; DOI: 10.1074/jbc.ra117.000197; PMID: 29109147; https://pubmed.ncbi.nlm.nih.gov/29109147/
Arabidopsis	At3g47380	Pectin methylesterase (PME) inhibitor involved in the maintenance of cell wall integrity in response to necrotrophic pathogens.	No verified direct reference in this release
Arabidopsis	At5g20740	Pectin methylesterase (PME) inhibitor that can target PMEs (e.g. PME2 and PME3) in a pH-dependent manner, mainly in slightly acidic conditions (pH 6.3 and 5.0) but not at pH 7.5.	Biochemical characterization of Pectin Methylesterase Inhibitor 3 from  Arabidopsis thaliana .; 2022; DOI: 10.1016/j.tcsw.2022.100080; PMID: 36147700; https://pubmed.ncbi.nlm.nih.gov/36147700/