response to external stimulus response to biotic stimulus interspecies interaction between organisms response to external stimulus response to biotic stimulus interspecies interaction between organisms response to external stimulus response to biotic stimulus interspecies interaction between organisms response to external stimulus response to biotic stimulus interspecies interaction between organisms response to external stimulus response to biotic stimulus interspecies interaction between organisms response to external stimulus response to biotic stimulus interspecies interaction between organisms response to external stimulus response to biotic stimulus interspecies interaction between organisms response to external stimulus response to biotic stimulus interspecies interaction between organisms response to external stimulus response to biotic stimulus interspecies interaction between organisms response to external stimulus response to biotic stimulus interspecies interaction between organisms response to external stimulusresponse to external stimulus response to biotic stimulusresponse to biotic stimulus interspecies interaction between organismsinterspecies interaction between organisms protein binding protein binding protein binding protein binding protein binding protein binding protein binding protein binding protein binding protein binding protein bindingprotein binding extracellular region cell membrane extracellular region cell membrane extracellular region cell membrane extracellular region cell membrane extracellular region cell membrane extracellular region cell membrane extracellular region cell membrane extracellular region cell membrane extracellular region cell membrane extracellular region cell membrane extracellular regionextracellular region cellcell membranemembrane 
