| N-Acetylneuraminic Acid-d3 | 0.31229 | UniProtKB |
| Myoglobin | 17 | Found via general search |
| Myeloperoxidase (MPO) | 150 | Found via general search |
| MUFA (Monounsaturated Fatty Acids) | 0.269 | Found via general search |
| Mucin-5B | 596.34 | UniProtKB |
| Mucin-5AC | 585.57 | UniProtKB |
| Mucin-2 | 550.85 | UniProtKB |
| MSPa (macrophage stimulating protein a) | 80 | 9045873 |
| M-protein (Myeloma protein) | 47.3 | Found via general search |
| MPIF-1 [Myeloid Progenitor Inhibitory Factor 1] | 13 | Found via general search |
