| 11. | The pigment cell people always knew about John.
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| 12. | A maternal uncle has vitiligo, an autoimmune condition that destroys patches of pigment cells in the skin.
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| 13. | Phototaxis there is mediated by simple eyespots that consists of a pigment cell and a photoreceptor cell.
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| 14. | At this time, hogs cannot be successfully freeze branded, as their hair pigment cells are better protected.
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| 15. | The varied and often vivid colours of echinoderms are produced by the action of skin pigment cells.
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| 16. | Melanoma occurs when the skin's pigment cells become cancerous, most often after prolonged exposure to the sun.
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| 17. | The signal by which sunlight stimulates melanin to pour out of pigment cells is unknown, Dr . Gilchrest said.
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| 18. | Mutations on KIT appear to limit the migration of melanocytes, leaving the extremities and midline devoid of pigment cells.
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| 19. | John is cited extensively in both the pigment cell literature and the literature on the toxicity of anticancer drugs.
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| 20. | Skin color changes as the larvae develop and pigment cells migrate and concentrate in different regions of the body.
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