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The proposed $13.6 billion acquisition of Life Technologies Corp. by Thermo Fisher Scientific Inc. faces few substantive regulatory hurdles, but the companies warn regulatory approval might not come until January 2014. Analysts said that's because of uncertainty about the timing of overseas antitrust approvals, particularly from China.

Ken deRegt will retire as head of fixed income at Morgan Stanley and be replaced by Michael Heaney and Robert Rooney. For other updates launch today's Movers & shakers slideshow.
Apax Partners offers $1.1 billion for Rue21, the same teenage fashion chain it took public in 2009. More video