Same receptor can perform multiple function. Such as Oryza sativa CERK1 Receptor may trigger a PTI response (Pathogen triggered immunity) with Oryza sativa CEBiP as a co-receptor; in presence of  CO8 Chitooligosaccharide. Whereas the same receptor CERK1 can play role in recognition of symbiotic signal, in presence of CO4 Chito-oligosaccharide,  using SYMRK as a Co-receptor.
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RIT RAJARSHI