File:Guanine-North Chincha Island.jpg

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Guanine-North_Chincha_Island.jpg ‎(645 × 567 pixels, file size: 146 KB, MIME type: image/jpeg)

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English: Yellow guanine crystals from the type locality (North Chincha Island, Pisco Province, Ica Department, Peru) and only one of the very few known localities worldwide. Original color of guanine is white but it darkens to yellow with exposure to light and time, as many organic compounds. Bodo Unger reported a new material that believed was xanthine in 1844. Einbrodt (1846) showed the identification was incorrect. Unger (1846) agreed, provided a full corrected description and named it guanine after the guano it was found in. Structural formula: NCHNHC2C(O)NHC(NH2)N. Aromatic heterocycle (an organic cyclic carbon compound with additional, non-carbon atom(s)); a nucleobase and an important constituent of both DNA and RNA. Ex Vandenbroucke Museum collection from Waregem, Belgium.
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Author David Hospital

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current16:23, 9 April 2021Thumbnail for version as of 16:23, 9 April 2021645 × 567 (146 KB)David Hospital (talk | contribs)Uploaded own work with UploadWizard

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