ARK1 (A. THALIANA RECEPTOR KINASE I); kinase. similar to S-locus protein kinase, putative [Arabidopsis thaliana] (TAIR:AT4G21370.1); similar to ARK3 (Arabidopsis Receptor Kinase 3), kinase [Arabidopsis thaliana] (TAIR:AT4G21380.1); similar to ARK2 (Arabidopsis Receptor Kinase 2), kinase [Arabidopsis thaliana] (TAIR:AT1G65800.1); similar to receptor kinase 1 [Brassica rapa] (GB:BAA23676.1); similar to receptor-like kinase [Brassica oleracea var. acephala] (GB:CAA67145.1); similar to SFR1 [Brassica oleracea var. acephala] (GB:CAA74661.1); contains InterPro domain Apple-like (InterPro:IPR003609); contains InterPro domain Protein kinase, core; (I