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Fig. 31. Trial of pearl production with cultured mantle cells. A - cells outgrowing from the mantle fragment on day 1. B - cell suspension used for the injection. Cells outgrown from the mantle fragments (shown in A) were harvested by digestion of cell sheets with pronase. C - one of the 13 beads retrieved from the oysters was completely covered with nacreous layers (arrowhead), but the others were without pearl layers of any kind. Scale bars - 100 μm.

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