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Phosphonoacetaldehyde is a substrate of the enzyme Phosphonoacetaldehyde hydrolase that catalyzes the chemical reaction.

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Phosphoribosyl-N-Formylglycineamide is a ribonucleotide derivative.

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Phosphotungstic Acid

Phosphotungstic Acid is a commonly used negative stain for viruses, polysaccharides, nerves, and other biological issue material to be viewed by transmission electron microscopy. Phosphotungstic acid (PTA) at low pH has been used as a section stain to visualize surface coats of ductal epithelial cells within human breast biopsies in the electron microscope.

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