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Any of several proteins found in the lens of the eye in vertebrates and certain invertebrates.

[Latin crystallum, crystal; see crystal + -in.]
References in periodicals archive ?
This method could help to establish the point at which the irreversible crystalline protein change has occurred triggering the need for surgical intervention.
Besides the pigments, the bacteria churn out other antibiotics and huge amounts of an intriguing crystalline protein. In addition, the bacteria's insect-killing toxin can take out a wide range of pests and has recently gone into development for potential commercial use.
The gene and its protein product are well characterized, and for 28 years farmers have used the crystalline protein itself as a pesticidal spray on dozens of food crops, including peaches, bananas, lettuce, tomatoes and cabbage.