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The Picro-Sirius Red Stain Kit (For Collagen) is intended for use in the histological visualization of collagen I and III fibers in addition to muscle in tissue sections. The PSR stain may be viewed using standard light microscopy or polarized light resulting in birefringence of the collagen fibers to distinguish between type I and type III.
Light Microscopy Collagen: Red Muscle Fibers: Yellow Cytoplasm: Yellow
Polarized Light Microscopy Type I (Thick fibers): Yellow-Orange Birefringence Type III (Thin fibers): Green Birefringence
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