PRINCETON, N.J. — A partnership between New York-based RXR Realty and The Blackstone Group has sold University Square, a five-story office building totaling 330,000 square feet in Princeton. The sale also included the adjacent 33,600-square-foot building, 115 Campus Drive. The property is positioned along the Route 1 Corridor, about halfway between Philadelphia and New York City. Tenants include investment management company BlackRock and insurance company AXIS Capital. JLL represented the seller and procured the buyer, New York-based Argent Ventures, in the transaction. The price was undisclosed.