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  • Tyrosine
  • PLP is retained in the active site not only thanks to the lysine, but also thanks to the interaction of the phosphate group and a phosphate binding pocket and to a lesser extent thanks to base stacking of the pyridine ring with an overhanging aromatic residue, generally tyrosine (which may also partake in the acid-base catalysis). (wikipedia.org)
  • oral
  • Oral solution of pyridoxal phosphate start with 5mg per kg body weight per day in two dosages over 6 weeks, increase stepwise by 5mg/kg body weight every 6 weeks up to 20 mg/kg body weight/d. (clinicaltrials.gov)
  • active
  • Once the Schiff base linkage is formed, holding the PLP molecule in the active site, the phosphate group on the PLP readily donates a proton to an inorganic phosphate molecule, allowing the inorganic phosphate to in turn be deprotonated by the oxygen forming the α-1,4 glycosidic linkage. (wikipedia.org)
  • step
  • Glycogen phosphorylase catalyzes the rate-limiting step in glycogenolysis in animals by releasing glucose-1-phosphate from the terminal alpha-1,4-glycosidic bond. (wikipedia.org)