| Moroctocog Alfa Action Pathway |  | Drug Action | Calcium / Moroctocog alfa |
| Morphine Action Pathway |  | Drug Action | ATP / Morphine / Norepinephrine / Dopamine / Potassium cation / Calcium / Uridine-5'-Diphosphate |
| Morphine Metabolism Pathway |  | Drug Metabolism | Morphine / Uridine-5'-Diphosphate |
| Morphine Opioid Agonist Action Pathway |  | Drug Action | ATP / Morphine / Calcium / Magnesium cation / Cyclic adenosine monophosphate / gamma-Aminobutyric acid / Pyrophosphoric acid / Sar9, Met (O2)11-Substance P |
| Morphine Opioid Agonist Brain Action Pathway |  | Drug Action | ATP / Morphine / Calcium / Magnesium cation / Cyclic adenosine monophosphate / gamma-Aminobutyric acid / Pyrophosphoric acid |
| Morpholinylmercaptobenzothiazole Predicted Metabolism Pathway |  | Metabolic | Mesoheme / Morpholinylmercaptobenzothiazole |
| Moxidectin Predicted Metabolism Pathway |  | Metabolic | Mesoheme / Moxidectin |
| mTOR Signaling pathway |  | Signaling | Arginine / L-Glutamine / Leucine / ATP / Magnesium cation / Zinc |
| Mucopolysaccharidosis VII. Sly Syndrome |  | Disease | Pyridoxal phosphate / NADH / ATP / Calcium / Magnesium cation / Uridine diphosphate glucose / Maltose / Uridine-5'-Diphosphate / Pyrophosphoric acid / Fructose |
| Mucopolysaccharidosis VII. Sly Syndrome |  | Disease | Pyridoxal phosphate / NADH / ATP / Calcium / Magnesium cation / Uridine diphosphate glucose / Maltose / Uridine-5'-Diphosphate / Pyrophosphoric acid / Fructose |
| Multiple Carboxylase Deficiency, Neonatal or Early Onset Form |  | Disease | Biotin / Lysine / ATP / Pyrophosphoric acid |
| Multiple Carboxylase Deficiency, Neonatal or Early Onset Form |  | Disease | Biotin / Lysine / ATP / Pyrophosphoric acid |
| Muscular Gi Protein Cascade |  | Physiological | ATP / Calcium / Magnesium cation / Cyclic adenosine monophosphate |
| Muscular Gq Protien Cascade |  | Physiological | Calcium |
| Muscular Gs Protein Cascade |  | Physiological | ATP / Calcium / Magnesium cation / Cyclic adenosine monophosphate |
| Muzolimine Drug Metabolism |  | Metabolic | Muzolimine |
| Mycophenolate mofetil Predicted Metabolism Pathway |  | Metabolic | Mycophenolate mofetil / Mesoheme |
| Mycophenolic Acid Action Pathway |  | Drug Action | Tetrahydrofolic acid / Aspartic acid / L-Glutamine / Adenosine phosphate / Glutamic acid / Glycine / NADH / ATP / Mycophenolic acid / Potassium cation / Calcium / Magnesium cation / 5-O-phosphono-alpha-D-ribofuranosyl diphosphate / AICA ribonucleotide / Guanosine-5'-Monophosphate / Guanine / Guanosine / Ribose-1-Phosphate / Pyrophosphoric acid / Maleic acid |
| Mycophenolic Acid Metabolism Pathway (old) |  | Drug Metabolism | NADH / ATP / Mycophenolate mofetil / Mycophenolic acid / Potassium cation / Mesoheme / Uridine-5'-Diphosphate / Formaldehyde |
| Mycophenolic acid Predicted Metabolism Pathway |  | Metabolic | Mycophenolic acid / Mesoheme |
| Myoadenylate Deaminase Deficiency |  | Disease | Tetrahydrofolic acid / Aspartic acid / L-Glutamine / Adenosine phosphate / Glutamic acid / Glycine / NADH / ATP / Adenine / Adenosine / Potassium cation / Calcium / Magnesium cation / Zinc / 5-O-phosphono-alpha-D-ribofuranosyl diphosphate / Uric acid / AICA ribonucleotide / Guanosine-5'-Monophosphate / Xanthine / Guanine / Cyclic adenosine monophosphate / Mesoheme / Guanosine / Ribose-1-Phosphate / Flavin adenine dinucleotide / Hypoxanthine / Pyrophosphoric acid / Maleic acid / Inosine / 2'-Deoxyguanosine-5'-Monophosphate |
| Myoadenylate Deaminase Deficiency |  | Disease | Tetrahydrofolic acid / Aspartic acid / L-Glutamine / Adenosine phosphate / Glutamic acid / Glycine / NADH / ATP / Adenine / Adenosine / Potassium cation / Calcium / Magnesium cation / Zinc / 5-O-phosphono-alpha-D-ribofuranosyl diphosphate / Uric acid / AICA ribonucleotide / Guanosine-5'-Monophosphate / Xanthine / Guanine / Cyclic adenosine monophosphate / Mesoheme / Guanosine / Ribose-1-Phosphate / Flavin adenine dinucleotide / Hypoxanthine / Pyrophosphoric acid / Maleic acid / Inosine / 2'-Deoxyguanosine-5'-Monophosphate |
| Nabumetone Action Pathway |  | Drug Action | Glutamic acid / Glutathione / Nabumetone / Dinoprostone / Calcium / Magnesium cation / Zinc / Prostaglandin D2 / Mesoheme / Prostaglandin G2 / Arachidonic Acid |
| Nabumetone NSAID Action Pathway |  | Drug Action | Glutathione / Nabumetone / Dinoprostone / Calcium / Mesoheme / Prostaglandin G2 / Arachidonic Acid |
| nAchR Smooth Muscle Contraction |  | Physiological | Calcium / Magnesium cation / Acetylcholine |