Table 1. Summary of Commercially Available Kits We Tested.

	Covance Aβ x-40	Covance Aβ x-42	Invitrogen Aβ 40	Invitrogen Aβ 42	Wako Aβ 40	Wako Aβ 42
Species	Rodent and Human	Rodent and Human	Rodent	Rodent	Rodent and Human	Rodent and Human
Signal to Noise Ratio	Poor	Poor	Good	Good	Excellent	Excellent
Cost	Lowest	Lowest	Low-Intermediate	Low-Intermediate	Highest	Highest