Waiting period for Bristol-ZymoGenetics deal expires

NEW YORK The Hart-Scott-Rodino waiting period for Bristol-Myers Squibb’s acquisition of Seattle-based biotech company ZymoGenetics has expired, enabling Bristol’s acquisition to go through, the drug maker said Tuesday.

The drug maker announced the deal to acquire ZymoGenetics for $885 million, or $9.75 per share, earlier this month.

The buyout gives Bristol ownership of Recothrom, a drug used to control bleeding during surgical procedures; an investigative treatment for hepatitis C called pegylated-interferon lambda; and an investigative treatment for melanoma called interleukin-21, or IL-21.