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MarkWest Energy Partners has acquired the 49% interest in MarkWest Liberty Midstream & Resources previously held by the Energy & Minerals Group. The deal includes $1 billion of cash and the issuance of 19.95 million unregistered MWE Class B Units to the Energy and Minerals Group. MarkWest focuses on the gathering, transportation, and processing of natural gas. The Energy & Minerals focuses on investments in the natural resources industry.

Main Street Capital Corp. has exited its debt and equity investment in Merrick Systems Inc., the company announced. Main Street Capital exited when HitecVision, a Norwegian-based private equity investor, took a majority stake in Merrick. Publicly traded Main Street provides long-term debt and equity capital to lower middle market companies.

Vistaprint, the listed maker of professional marketing products and services, said Friday that it had completed its $117.5 million acquisition of Webs Inc. Silver Spring, Maryland-based Webs had raised venture capital from Novak Biddle Venture Partners and Columbia Capital.

Alexion Pharmaceuticals Inc. will pay $610 million in cash – and as much as $470 million in future milestone-based payments - to acquire Enobia Pharma Corp. Enobia is a biopharma company developing therapies to treat patients with ultra-rare and life-threatening genetic metabolic disorders. Enobia closed a $40 million round earlier this year, and was backed by investors including OrbiMed Advisors, CTI Life Sciences Fund, Desjardins Venture Capital and Lothian Partners.

Stealthy mobile start-up Just.me Inc. has raised $2.7 million, according to a regulatory filing. The company, founded by TechCrunch co-founder Keith Teare, reportedly raised a previous $600,000 seed funding round from investors including Google Ventures and True Ventures. In June, as it reported the seed round, TechCrunch also revealed that Michael Arrintgon was a shareholder in Just.me.

Israel’s Magma Venture Capital is in fundraising mode, according to a new filing with the Securities & Exchange Commission. The firm is looking to secure $100 million for its Magma Venture Capital III, L.P. Tel Aviv-based Magma focuses on early-stage investments in communication, semiconductors, internet and media.

China no longer wants foreign-funded automobile factories or polysilicon plants, but would welcome overseas investment in hospitals and financial leasing firms, according to updated inward investment guidelines, Reuters wrote Thursday. The 29-page list, published on the website of China's economic planning agency, outlines sectors where foreign investors will be encouraged, restricted or completely banned, Reuters wrote.

Investment firm W.P. Carey & Co. has closed on a $450 million unsecured revolving credit facility. The facility will replace a $250 million unsecured revolving credit facility that was due to expire in June of 2012, the firm announced Thursday.

Golub Capital said Wednesday that it was providing debt financing to support the acquisition of Bradenton, Fla.-based First Watch Restaurants Inc. by Freeman Spogli & Co. Terms of the deal were not released. First Watch owns 82 restaurants spanning nine states. Freeman Spogli is a private equity firm with offices in Los Angeles and New York.

Osum Oil Sands Corp. announced Thursday that it would raise $500 million via a private placement of 21.2 million common shares and 18.8 million callable common share purchase warrants. The financing was led by a combination of new and existing shareholders, including KERN Partners, Government of Singapore Investment Corporation, Warburg Pincus and Blackstone Capital Partners. Osum is based in Alberta, Canada.