Table 1. Proteases commonly upregulated during Arabidopsis dPCD (Olvera-Carrillo et al., 2015).

AGI	Name	Annotation	Co-expressed with*	Upregulated in dPCD**
AT5G04200	AtMC9	Metacaspase 9	7 genes	b.c.
AT4G04460	PASPA3	Saposin-like aspartyl protease family protein	6 genes	12 conditions
AT3G45010	SCPL48	Serine carboxypeptidase-like 48	5 genes	12 conditions
AT4G35350	XCP1	Xylem cysteine peptidase 1	4 genes	b.c.
AT2G25940	αVPE	Alpha-vacuolar processing enzyme	3 genes	8 conditions
AT1G20850	XCP2	Xylem cysteine peptidase 2	3 genes	b.c.
AT1G23460	n.n.	Pectin lyase-like superfamily protein	3 genes	b.c.
AT1G63120	ATRBL2	RHOMBOID-like 2	3 genes	b.c.
AT5G50260	CEP1	Cysteine proteinases superfamily protein	2 genes	b.c.
AT1G01900	ATSBT1.1	Subtilase family protein	n.a.	8 conditions

^*based on a Genevestigator co-expression analysis with other dPCD-associated genes

^**dPCD conditions covered in meta-analysis

n.n. no name

n.a. not applicable

b.c. below cutoff value of 8 conditions