What is the correct order for an antigen detection ELISA?
Substrate, Samples, PrimryAntibody, Enz-linked 2ndAntibody
Samples, PrimryAntibody, Enz-linked 2ndAntibody, Substrate
Samples, Enz-linked 2ndAntibody, PrimryAntibody, Substrate
Samples, PrimryAntibody, Substrate, Enz-linked 2ndAntibody