High Quality Content by WIKIPEDIA articles! Pachychilus, common name jute snails, is a genus of freshwater snail with an operculum, aquatic gastropod mollusk in the family Pachychilidae.One of the Maya peoples, the Lacandon people, now Mexico's native peoples from state Chiapas, use one species[which?] of Pachychilus known locally as t'unu as a type of protein supplement to their diet. In addition, the shells from this "chuti" snail provide great nutritional value, as they provide calcium and lime when burned. The lime is then added to maize to release amino acids such as tryptophan and lysine and the vitamin niacin, which would otherwise be unavailable from the maize (unable to be metabolized) if the lime were not added.

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