| BC | B cells | |
| BL | blood | |
| BM | bone marrow | |
| BR | brain | |
| EP | epithelial cells | |
| ER | erythroid cells | |
| CO | colon | |
| FI | fibroblasts | |
| GO | gonads | |
| HE | heart | |
| HO | expressed in cells of hematopoietic origin | |
| IN | intestine | |
| KD | kidney | |
| LI | liver | |
| LU | lung | |
| MC | melanoma | |
| MM | myelomonocytic cells | |
| MT | multiple, expressed in more than two tissues | |
| MU | muscle | |
| NE | neurons | |
| OV | ovaries | |
| PA | pancreas | |
| PI | pituritary | |
| PL | placenta | |
| SK | skeletal muscle | |
| SM | smooth muscle | |
| SP | spleen | |
| ST | striated muscle | |
| TC | T-cells | |
| TE | testis | |
| TH | thymus | |
| TW | expressed in two tissues | |
| TY | thyroid cells | |
| 00 | unknown |