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== Phenylalanine Hydroxylase Structure ==
== Phenylalanine Hydroxylase Structure ==


<Structure load='1j8u' size='500' frame='true' align='right' caption='Catalytic Domain of Human Phenylalanine Hydroxylase Fe(II) in Complex with Tetrahydrobiopterin' scene='Insert optional scene name here' />
<Structure load='1j8u' size='500' frame='true' align='right' caption='Catalytic Domain of Human Phenylalanine Hydroxylase Fe(II) in Complex with Tetrahydrobiopterin' scene= <scene name='56/564044/Active_residues/1'>Active site residues</scene> />


Although the full-length structure of mammalian PAH has not yet been clearly known, a large part of it has been identified. <ref name= "flydal"/>. It was solved by means of crystallizing the protein (at pH=7) to perform X-ray diffraction using molecular replacement. The search model used was based on the crystal structure of tyrosine hydroxylase because of the similarity between the two enzymes. <ref name="fusetti"> Fusetti, Fabrizia, Heidi Erlandsen, Torgeir Flatmark, and Raymond Stevens. "Structure of Tetrameric Human Phenylalanine Hydroxylase and Its Implications for Phenylketonuria." The Journal of Biological Chemistry 273.27 (1998): 16962-16967. Web. </ref>. The R-factor recorded was 0.251 and the mean B (or temperature) value was 33.0. <ref name= "pdb"/>.
Although the full-length structure of mammalian PAH has not yet been clearly known, a large part of it has been identified. <ref name= "flydal"/>. It was solved by means of crystallizing the protein (at pH=7) to perform X-ray diffraction using molecular replacement. The search model used was based on the crystal structure of tyrosine hydroxylase because of the similarity between the two enzymes. <ref name="fusetti"> Fusetti, Fabrizia, Heidi Erlandsen, Torgeir Flatmark, and Raymond Stevens. "Structure of Tetrameric Human Phenylalanine Hydroxylase and Its Implications for Phenylketonuria." The Journal of Biological Chemistry 273.27 (1998): 16962-16967. Web. </ref>. The R-factor recorded was 0.251 and the mean B (or temperature) value was 33.0. <ref name= "pdb"/>.