Polyadenylation Site Biases Found in Each Category of Tissues (Mouse)
| Tissue type | Total EST in tissue | Total libraries in tissue | mRNAs with bias in tissue | Total biases in tissue |
| Embryo | 131214 | 10 | 56 | 74 |
| Breast | 106676 | 5 | 35 | 48 |
| Unknown | 102196 | 9 | 26 | 31 |
| Thymus | 74815 | 3 | 9 | 9 |
| Testis | 54729 | 3 | 18 | 24 |
| Brain | 54255 | 3 | 4 | 4 |
| Derm | 43907 | 3 | 6 | 7 |
| Kidney | 40994 | 4 | 28 | 39 |
| Fetus | 37562 | 2 | 7 | 7 |
| Muscle | 34710 | 2 | 2 | 2 |
| Nervous | 29666 | 2 | 4 | 4 |
| Liver | 29132 | 3 | 9 | 12 |
| Spleen | 24136 | 1 | 5 | 6 |
| Heart | 22345 | 3 | 4 | 6 |
| Tonsil | 20252 | 2 | 2 | 2 |
| Mixed | 16058 | 3 | 3 | 3 |
| Lymphatic | 14753 | 1 | 2 | 2 |
| Vessel | 14572 | 1 | 1 | 1 |
| Cell line | 14510 | 1 | 1 | 1 |
| Germinal | 13979 | 2 | 4 | 4 |
| Buccal | 11489 | 1 | 2 | 4 |
| Colon | 10495 | 1 | 2 | 3 |
| Intestine | 9781 | 1 | 4 | 4 |
| Tcell | 9459 | 1 | 1 | 1 |
| Vagina | 8930 | 1 | 1 | 1 |
| Bone | 8262 | 1 | 1 | 1 |
| Ovary | 7577 | 1 | 2 | 2 |
| Stomach | 7427 | 1 | 2 | 2 |
| Uterus | 6170 | 1 | 2 | 2 |
| Placenta | 5707 | 1 | 1 | 1 |
| Lung | 4406 | 1 | 1 | 1 |
| Adrenal | 3765 | 1 | 1 | 2 |
| Total | 973929 | 75 | 246 (189 distinct) | 310 |