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The image displays a page from a biology textbook or study material discussing "Polar, negatively charged R groups." Two chemical structures of amino acids are shown: Aspartate and Glutamate. The structure for Aspartate is on the left, and Glutamate is on the right, with Glutamate's structure being longer. Both amino acids feature a central carbon atom bonded to an amino group (NH3+), a carboxyl group (COO-), a hydrogen atom (H), and a side chain (R group). In Aspartate, the R group consists of a CH2 group followed by a COO-. In Glutamate, the R group is a CH2 group, followed by another CH2 group, and then a COO-. Handwritten annotations are present on the page, including a circled "D" next to Aspartate and a circled "E" next to Glutamate, likely representing the single-letter codes for these amino acids. A page number "20" is visible in the bottom right corner. The page is partially creased and appears to be on a surface with a checkered pattern, possibly a table or a floor, with some shadows indicating the presence of objects above the page. There is no information in the image that suggests a location in Jalingo, Nigeria.
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