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Collaborations
 3 Months Ended
Mar. 31, 2023
Organization Consolidation And Presentation Of Financial Statements [Abstract]  
Collaborations

7.

Collaborations

ISU Abxis

In December 2018, the Company entered into an amended and restated license agreement with ISU Abxis (the “A&R ISU Abxis Agreement”). Under the A&R ISU Abxis Agreement, ISU Abxis will receive commercialization rights in South Korea to the Company’s engineered Factor IX dalcinonacog alfa - DalcA and the Company will receive clinical development and commercialization rights in the rest of world (excluding South Korea) and manufacturing development and manufacturing rights worldwide (including South Korea). The A&R ISU Abxis Agreement provides for a low single-digit royalty payment to ISU Abxis, on a country-by-country basis, for net product sales of DalcA by the Company or its affiliates in each country other than South Korea. Pursuant to the A&R ISU Abxis Agreement, the Company will also pay up to an aggregate of $19.5 million in milestone payments to ISU Abxis, including $2.5 million in regulatory and development milestone payments and up to $17.0 million in commercial milestone payments, if the applicable milestones are met.

As a result of the sale of the Company’s rare bleeding disorders programs, including DalcA and other assets, to GCBP in February 2023, the A&R ISU Abxis Agreement was transferred to GCBP. See Note 11, Restructuring. As of the date of transfer, no milestones have been met.