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Fig. 3 | Frontiers in Zoology

Fig. 3

From: Eumelanin and pheomelanin pigmentation in mollusc shells may be less common than expected: insights from mass spectrometry

Fig. 3

To test the predominance of eumelanin in different shell layers of Mytilus edulis the outermost brown periostracum was removed from one shell valve while the other valve was measured with intact periostracum. Eumelanin oxidation products PDCA and PTCA were quantitated by HPLC with UV detection with external calibration and measurements were normalized to initial sample weight

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