I've been working with two-dimensional IEF/SDS-PAGE to determine the pI range of my plant phospho-protein. I plan to soon buy Antiphospho-Ser/Thr and Antiphospho-Tyr in order to determine type of amino acid that is phosphophorylated in vivo.
Is there anyone who is familiar enough with the following companies to aid me in distinguishing which one has the best product?
A. Cell Signaling Technologies
B. Upstate Cell Signaling solutions
D. Other Manufacturers
Thanks for the input.