Dr. Lavie, Alamar blue is the dye known as resazurin. The trade marked name alamarBlue includes some additional stabilizers that are described in a US patent issued ~5 years ago (I think the patent is assigned to Alamar Biosciences; but I think they are not in the research reagent business any more.) There are distributors that still sell the reagent; but I am away from my office and don't have the info here in front of me and I can't remember who it is. I think there was a lot of earlier work with this dye as a redox indicator (resazurin -> resorufin) used to detect the level of bacterial contamination in milk... perhaps dating back to the 50s or even earlier??? If you are simply looking for a redox indicator as an indicator of viable cell number and you can accept a colorimetric readout in a multiwell format, you might consider one or the tetrazolium reagents (MTT or MTS). If you are simply looking for a fluorescent indicator of viable cells, you might consider calcein-AM. Ty Lee -----Original Message----- From: P.Lavie <plavie@techunix.technion.ac.il> To: cyto-inbox Date: Thursday, July 06, 2000 1:24 PM Subject: alamar blue > >We are looking for nformation about alamar blue. Do you have any >information where can we purchase it. >Sincerely >P Lavie >Faculty of Medicine >Technion Israel Institute f Technology >
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