Chitin elicitor-binding protein involved in the perception and transduction of chitin oligosaccharide elicitor signal for defense responses. Forms homooligomer. Interacts with CERK1. Binds to chitin oligosaccharide elicitor. Interacts with LYP4 and LYP6 (PubMed:24964058). Expressed in seedlings, roots, shoots, stems and flowers. By chitin oligosaccharide elicitor. N-glycosylated. Extended N-terminus.