13Ca resonances (100%), 1Ha(99.6%), non-proline backbone 1HN and 15N (94%), and side-chain 13C and 1H (85%) chemical shift assignment for URO-synthase - Cunha, Luis; Kuti, Miklos; Bishop, David F.; Mezei, Mihaly; Zeng, Lei; Zhou, Ming-Ming; Desnick, Robert J. (Biological Magnetic Resonance Bank, 2007)