From second link in that
Alternatively, spleen cells from animals of the same group were pooled and plated as described above. Supernatants were collected and IFN-? concentration was determined using the Ready-SET-Go! ELISA set (eBiosciences, San Diego, CA) according to the manufacturer's instructions
additionally
Merck KgaA to Acquire Sigma-Aldrich for $17 Billion
February 2014
“The acquisition creates a powerhouse chemicals, reagents, life science kits, and labware supplier, combining Merck’s EMD Millipore $3.3 billion arm and Sigma-Aldrich’s $2.7 billion global presence.
Add the chemical plant in Tempe
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