| http://www.w3.org/ns/prov#value | - A second bioengineered molecule, "sensor 6, fluoresced in the presence of both types of compounds, making it a reliable indicator of chemicals that bind to the receptor.When incubated in human cells, the sensors responded to estrogenic compounds within a few hours, Zhao said, with the fluorescent signals gradually increasing in strength up to 24 hours.
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