Abstract
Many basic fluorescent dyes stain juxtaglomerular granules to produce characteristic colors in ultraviolet light. The stain is applied to paraffin sections of tissues fixed in 2% calcium acetate-10% formalin or in phosphate-buffered 10% formalin. Procedure: Bring section to water, stain 0.5 min in Delafield hematoxylin, wash in tap water, stain 3 min in a 0.1% aqueous solution of basic fluorescent dye (auramine O, acriflavine, acridine orange, coriphosphine O, acridine yellow, phosphine E, thioflavine T, berberine sulfate, atebrine or rivanol) and differentiate 1 min in 0.1% acetate acid (or omit this step). After washing in tap water, air dry with or without subsequent mounting in a resin. Juxtaglomerular granules stain bright fluorescent yellow or orange against a dark background.
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