... belocated in the body of this species using alcian blue stainingand it was suggested to be the main constituent of the mucus. In the present work, we provide further information on the structure ... wereobserved in the metachromatic pattern of eluted GAGamong the three samples (Fig. 6Ba–c). The pattern of protein elution was only modified in the papain-digestedsample (Fig. 6Bd–f). Together, these ... silk-likeorganic matrix in the nacreous layer of the bivalve Pinctadamaxima. A new insight in the biomineralization field. Eur. J.Biochem. 269, 499 4–5 003.27. Be´douet, L., Schuller, M.J., Marin, F., Milet,...