NEW YORK, Jan 22 – The Nasdaq said Monday it had slashed the number of companies it would include in its biotechnology index from 202 to 76, including a number of genomics companies that recently raised tens of millions of dollars last year but have since seen their share prices fall.

The change in the index will be effective Tuesday.

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The UK's Human Fertility and Embryology Authority calls for consumer genetic testing companies to warn customers that testing could uncover family secrets, according to the Guardian.

The New York Times reports that United Nations delegates have been discussing how to govern the genetic resources of the deep sea.

Researchers have transplanted edited cells into mice that appear to combat cocaine addiction, New Scientist reports.

In PNAS this week: analysis of proteolytic enzymes secreted by circulating tumor cells, phylogenetic study of Fv1 evolution, and more.