1. Mechanism of polyadenylation

Salamov, Asaf A., and Victor V. Solovyev. "Recognition of 3'-processing sites of human mRNA precursors." Bioinformatics 13.1 (1997): 23-28.

2.Prediction scores of twelve classes polyA（10-fold validation）

3. Comparation with other methods in predicting AATAAA polyA site

AATAAA	Sp（%）	Sn（%）	Acc（%）
Our CNN	84.69±3.55	85.57±2.45	84.97±1.77
ANN	80.55	80.55	82.06
SVM	37.2-71.0	74.6-96.7%	61.36
polyapred	75.8-95.7	56.0-93.3	67.5-93.3

4. Visualization by Grad-CAM

We confirm that the human polyA signal is determinded by 15 bp of its upsteam and downstream sequece.