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PHILADELPHIA — Keystone Property Group has landed a new life sciences tenant at The Curtis, the metro Philadelphia-based developer’s 912,245-square-foot facility in Philadelphia that is a redevelopment of a former printing press. Aro Biotherapeutics Co., a developer of genetic medicines, has committed to an undisclosed amount of space at the 12-story building. Bob Zwengler, Anthony Pell, Matt Knowles and Paul Touhey of CBRE represented the tenant in the lease negotiations. Tim Conrey, Lisa Berger Baskin and K.J. Kulik of Scheer Partners represented Keystone.