Hi Prasad, Blasticidin S from Fisher Scientific is good. Filter sterilize it. Here is the link. http://www.fishersci.com/wps/portal/PRODUCTDETAIL?prodcutdetail=%27prod%27&productId=722808&catalogId=29104&matchedCatNo=BP264725||BP2647100||BP264750&pos=1&catCode=RE_SC&endecaSearchQuery=%23store%3DScientific%23N%3D0%23rpp%3D15&fromCat=yes&keepSessionSearchOutPut=true&fromSearch=Y&searchKey=Blasticidin&highlightProductsItemsFlag=Y Sandhya. Dr. Sandhya N Baviskar Assistant Professor Department of Biology University of Arkansas- Fort Smith 5210 Grand Ave. Fort Smith AR 72913 Phone : 479-788-7789 ________________________________________ From: DICTY [[log in to unmask]] On Behalf Of prasad ls [[log in to unmask]] Sent: Tuesday, August 17, 2010 11:38 AM To: [log in to unmask] Subject: [DICTY - 387] HELLO Dear Dicty colleagues, I have few questions for the community. 1) Is there a specific, exclusive and labile marker which expresses only in the upper and lower cup cells? 2) We want 5-NT- and amtC-/regA- mutants for our experiments but unfortunately it is not available in the stock center, does someone have it in their lab? 3) We would also like to know which company gives Blasticidin at a reasonable price. Regards Prasad Indian Institute of Technology - Madras