* Texas Biotechnology Corp., Houston, will separate on Nov. 7 the4 million units issued in conjunction with its initial public offeringin December 1993. The company said it exercised its option toseparate the units, with consent of underwriter D. Blech & Co.,earlier than the original one-year anniversary date of Dec. 15, 1994.* American Biogenetic Sciences Inc., Copiague, N.Y., said it iscutting its workforce 40 percent. It refused to provide additionaldetails to BioWorld.

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