Fig. 3: HCl-AHPO-HPLC data for black, rufous and white feathers from extant birds with, and without, thermal treatment. | Nature Communications

Fig. 3: HCl-AHPO-HPLC data for black, rufous and white feathers from extant birds with, and without, thermal treatment.

From: Taphonomic experiments reveal authentic molecular signals for fossil melanins and verify preservation of phaeomelanin in fossils

Fig. 3: HCl-AHPO-HPLC data for black, rufous and white feathers from extant birds with, and without, thermal treatment.The alt text for this image may have been generated using AI.

Bar charts show melanin marker concentrations for untreated feathers and feathers thermally matured at 200 °C and 250 °C. Melanin markers are generated during HCl-alkaline hydrogen peroxide oxidation (AHPO). Filled bars indicate the mean values per treatment; floating bars indicate standard deviation per treatment. Black and rufous feathers are from the domestic chicken (each n = 5; Gallus gallus) and white feathers are from the little egret (n = 4; Egretta garzetta). Data are presented as mean ± SD. PTCA pyrrole-2,3,5-tricarboxylic acid, PDCA pyrrole-2,3-dicarboxylic acid, PTeCA pyrrole-2,3,4,5-tetracarboxylic acid, TTCA thiazole-2,4,5-tricarboxylic acid, TDCA thiazole-4,5-dicarboxylic acid. Source data are provided as a Source Data file.

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