Conchiolin

Rarity: Common

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Notion

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Science and technology

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What Wikipedia says

Conchiolins (sometimes referred to as conchins) are complex proteins which are secreted by a mollusc's outer epithelium (the mantle).

Excerpt from the Wikipedia article “Conchiolin”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: James St. John, CC BY 2.0, via Wikimedia Commons.