* GeneReviews/NCBI/NIH/UW entry on Hemophilia B* The MEROPS online database for peptidases and their inhibitors: S01.214* An X(-mas) Factor that gets our vote- QUite Interesting PDB Structure article at PDBe
== References ==== Further reading ==== External links ==* GeneReviews/NCBI/NIH/UW entry on Hemophilia B* The MEROPS online database for peptidases and their inhibitors: S01.214* An X(-mas) Factor that gets our vote- QUite Interesting PDB Structure article at PDBe