| Phosphatidylethanolamine Biosynthesis PE(9D5/9M5) |  | Metabolic | Choline / Serine / ATP / Cytidine-5'-Triphosphate / Ethanolamine / Pyrophosphoric acid |
| Phosphatidylethanolamine Biosynthesis PE(9M5/11D3) |  | Metabolic | Choline / Serine / ATP / Cytidine-5'-Triphosphate / Ethanolamine / Pyrophosphoric acid |
| Phosphatidylethanolamine Biosynthesis PE(9M5/11D5) |  | Metabolic | Choline / Serine / ATP / Cytidine-5'-Triphosphate / Ethanolamine / Pyrophosphoric acid |
| Phosphatidylethanolamine Biosynthesis PE(9M5/11M3) |  | Metabolic | Choline / Serine / ATP / Cytidine-5'-Triphosphate / Ethanolamine / Pyrophosphoric acid |
| Phosphatidylethanolamine Biosynthesis PE(9M5/11M5) |  | Metabolic | Choline / Serine / ATP / Cytidine-5'-Triphosphate / Ethanolamine / Pyrophosphoric acid |
| Phosphatidylethanolamine Biosynthesis PE(9M5/13D5) |  | Metabolic | Choline / Serine / ATP / Cytidine-5'-Triphosphate / Ethanolamine / Pyrophosphoric acid |
| Phosphatidylethanolamine Biosynthesis PE(9M5/13M5) |  | Metabolic | Choline / Serine / ATP / Cytidine-5'-Triphosphate / Ethanolamine / Pyrophosphoric acid |
| Phosphatidylethanolamine Biosynthesis PE(9M5/9D3) |  | Metabolic | Choline / Serine / ATP / Cytidine-5'-Triphosphate / Ethanolamine / Pyrophosphoric acid |
| Phosphatidylethanolamine Biosynthesis PE(9M5/9D5) |  | Metabolic | Choline / Serine / ATP / Cytidine-5'-Triphosphate / Ethanolamine / Pyrophosphoric acid |
| Phosphatidylethanolamine Biosynthesis PE(9M5/9M5) |  | Metabolic | Choline / Serine / ATP / Cytidine-5'-Triphosphate / Ethanolamine / Pyrophosphoric acid |
| Phosphatidylinositol Phosphate Metabolism |  | Metabolic | ATP / Calcium / Magnesium cation / Inositol |
| Phosphoenolpyruvate Carboxykinase Deficiency 1 (PEPCK1) |  | Disease | Pyruvic acid / Biotin / NADH / ATP / Magnesium cation / 2-phospho-D-glyceric acid / Phosphoenolpyruvate / D-glyceraldehyde 3-phosphate / Dihydroxyacetone phosphate |
| Phospholipase C Signaling Pathway |  | Signaling | Calcium |
| Phospholipid Biosynthesis |  | Metabolic | Choline / Phosphatidyl serine / NADH / Calcium / Magnesium cation / sn-glycerol 3-phosphate / Acetylcholine / Flavin adenine dinucleotide / N,N,N-Trimethyl-2-(phosphonooxy)ethanaminium / Ethanolamine / Dihydroxyacetone phosphate |
| Phytanic Acid Peroxisomal Oxidation |  | Metabolic | Ascorbic acid / Succinic acid / NADH / ATP / Magnesium cation / Iron / Pyrophosphoric acid |
| Pimethixene H1-Antihistamine Action |  | Drug action | Calcium / Pimethixene |
| Pindolol Action Pathway |  | Drug action | ATP / Pindolol / Potassium cation / Calcium / Magnesium cation |
| Pirenzepine Action Pathway |  | Drug action | ATP / Pirenzepine / Potassium cation / Zinc / Acetylcholine |
| Piroxicam Action Pathway |  | Drug action | Glutamic acid / Glutathione / Piroxicam / Dinoprostone / Calcium / Magnesium cation / Zinc / Prostaglandin D2 / Mesoheme / Prostaglandin G2 / Arachidonic Acid |
| Plasmalogen Synthesis |  | Metabolic | Magnesium cation / Flavin adenine dinucleotide / Stearic acid / Dihydroxyacetone phosphate |
| Polythiazide Action Pathway |  | Drug action | Cysteine / Polythiazide / Potassium cation / Urea |
| Ponatinib Inhibition of BCR-ABL |  | Drug action | Ponatinib |
| Porphyria Variegata (PV) |  | Disease | Pyridoxal phosphate / Glycine / NADH / Aminolevulinic acid / Iron / Zinc / Protoporphyrin / Mesoheme / Flavin adenine dinucleotide / Uridine-5'-Diphosphate / Coproporphyrinogen III / Farnesyl diphosphate |
| Porphyrin Metabolism |  | Metabolic | Pyridoxal phosphate / Glycine / NADH / Aminolevulinic acid / Iron / Zinc / Protoporphyrin / Mesoheme / Flavin adenine dinucleotide / Uridine-5'-Diphosphate / Coproporphyrinogen III / Farnesyl diphosphate |
| Practolol Action Pathway |  | Drug action | ATP / Practolol / Potassium cation / Calcium / Magnesium cation |