Species	Reference gene ID	Possible function	Papers / DOI
Arabidopsis	At1g60800	Receptor kinase acting, redundantly with other CIKs (e.g. CIK1, CIK2, CIK3, CIK5 and CIK6), as a coreceptor of CLV1, CLV2/CRN and RPK2, and required for CLAVATA-family peptides (e.g. CLV3) signaling through phosphorylation; this signaling regulates protophloem differentiation and the maintenance of shoot apical meristem (SAM) and root apical meristem (RAM) homeostasis, and acts down-stream of BRX and OPS.	No verified direct reference in this release
Arabidopsis	At5g16000	May act as a receptor kinase regulating meristem homeostasis and protophloem differentiation.	Regulated nuclear trafficking of rpL10A mediated by NIK1 represents a defense strategy of plant cells against virus.; 2008; DOI: 10.1371/journal.ppat.1000247; PMID: 19112492; https://pubmed.ncbi.nlm.nih.gov/19112492/ | NIK1-mediated translation suppression functions as a plant antiviral immunity mechanism.; 2015; DOI: 10.1038/nature14171; PMID: 25707794; https://pubmed.ncbi.nlm.nih.gov/25707794/ | CLERK is a novel receptor kinase required for sensing of root-active CLE peptides in  Arabidopsis .; 2018; DOI: 10.1242/dev.162354; PMID: 29789310; https://pubmed.ncbi.nlm.nih.gov/29789310/
Arabidopsis	At3g25560	Receptor kinase acting, redundantly with other CIKs (e.g. CIK1, CIK2, CIK3, CIK5 and CIK6), as a coreceptor of CLV1, CLV2/CRN and RPK2, and required for CLAVATA-family peptides (e.g. CLV3, CLE25, CLE26 and CLE45) signaling through phosphorylation; this signaling regulates protophloem differentiation and the maintenance of shoot apical meristem (SAM) and root apical meristem (RAM) homeostasis, and acts down-stream of BRX and OPS.	No verified direct reference in this release
Arabidopsis	At2g23950	May act as a receptor kinase regulating meristem homeostasis and protophloem differentiation.	CLERK is a novel receptor kinase required for sensing of root-active CLE peptides in  Arabidopsis .; 2018; DOI: 10.1242/dev.162354; PMID: 29789310; https://pubmed.ncbi.nlm.nih.gov/29789310/ | A CLE-BAM-CIK signalling module controls root protophloem differentiation in Arabidopsis.; 2022; DOI: 10.1111/nph.17791; PMID: 34651321; https://pubmed.ncbi.nlm.nih.gov/34651321/
Rice	Os06g0274500	LRR receptor kinase that may be involved in defense response.	No verified direct reference in this release