phosphotungstic acid
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phos·pho·tung·stic ac·id (PTA),
(fos-fō-tŭng'stik as'id),A mixture of phosphoric and tungstic acids; a protein precipitant and reagent for arginine, lysine, histidine, and cystine; used with hematoxylin for nuclear and muscle staining; also used in electron microscopy as a stain for collagen and as a negative stain.
phos·pho·tung·stic ac·id
(PTA) (fos'fō-tŭng'stik as'id)A mixture of phosphoric and tungstic acids; a protein precipitant and reagent for arginine, lysine, histidine, and cystine; used with hematoxylin for nuclear and muscle staining; also used in electron microscopy as a stain for collagen and as a negative stain.
phos·pho·tung·stic ac·id
(PTA) (fos'fō-tŭng'stik as'id)A mixture of phosphoric and tungstic acids; a protein precipitant and reagent for arginine, lysine, histidine, and cystine; used with hematoxylin for nuclear and muscle staining; also used in electron microscopy as a stain for collagen and as a negative stain.