Did evolution really anticipate dioxin? (aryl hydrocarbon receptor studied)(Brief Article) From: Science News | Date: May 6, 1995| Author: Raloff, Janet | COPYRIGHT 1995 Science Service, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group.Copyright information

Most, if not all, mammalian cells possess a clump of proteins that will bind to dioxin, polychlorinated biphenyls (PCBs), and many other toxic pollutants. Once this pairing occurs, the complex travels as a unit to the cell's nucleus, where it can wreak havoc with DNA's normal, genetically prescribed activities.

For more than a decade, toxicologists have wrestled with the question of why animals evolved a receptor for pollutants emitted largely since World War II.

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