Skadden, Arps, Slate, Meagher & Flom and Jones Day, together with Wilmer Cutler Pickering Hale and Dorr, are advising on Japanese pharmaceutical research company Astellas Pharma’s $5.9 billion acquisition of U.S. drugmaker Iveric Bio.

Jones Day is acting as legal counsel to Tokyo-listed Astellas in its multi-billion-dollar takeover of Iveric Bio, which is being represented by Skadden and Wilmer Cutler, according to a statement announcing the deal.