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Figure 10 | BMC Evolutionary Biology

Figure 10

From: Dynamic expression of ancient and novel molluscan shell genes during ecological transitions

Figure 10

Sequence and expression analysis of Has-lustA. An alignment of Has-lustA with Lustrin A from Haliotis rufescens illustrates the high degree of sequence conservation. Positions shaded black indicate cases where more than 50% of the residues are identical, and grey where biochemical similarity is shared with the consensus residue. GenBank accession numbers are in brackets. (B) Spatial expression of Has-LustA in 1 mm juveniles begins with a population of cells along the left side of the animal. (C) Magnified view of the boxed region in B. At this stage of development individual, non-confluent cells expressing Has-lustA are visible. (D) In 5 mm juveniles Has-lustA positive cells have proliferated to become densely packed in the proximal region of the outer fold. (E) Magnified view of the boxed region in D. (F) Magnified view of the boxed region in E. The anterior edge of the outer fold (aeof) and the inner fold (if) are indicated. Has-lustA positive cells represent the region of the mantle responsible for the deposition of nacre.

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