Table 1. The searching datasets listed by species in APASdb website.

Species	Searching datasets	subsetsa	Poly(A) sites	Simple descriptionsb
D. rerio	Zv9_embryonic_development	8	108 290	Dynamic APA sites and 3′-UTRs, selection of heterogeneous cleavage sites during zebrafish embryonic development.
M. musculus	mm9_thymic_development	8	226 858	Dynamic APA sites and 3′-UTRs, selection of heterogeneous cleavage sites in mouse thymopoiesis.
H. sapiens	hg19_breastCancer_MCF10A-MCF7-MB231	3	46 531	Genome-wide APA sites and 3′-UTRs, selection of heterogeneous cleavage sites in human breast cancer cell lines MCF7 and MB231, also one cultured normal epithelial cell line MCF10A.
H. sapiens	hg19_rectalCancer_12N-VS-12T	2	74 116	Genome-wide APA sites and 3′-UTRs, selection of heterogeneous cleavage sites in human normal and tumorous tissues of intestinum rectum.
H. sapiens	hg19_rhinosinusitis_11N11P25N25P26N26P	6	83 641	Genome-wide APA sites and 3′-UTRs, selection of heterogeneous cleavage sites in nasal polyps and nasal uncinate process mucosa of eosinophilic chronic rhinosinusitis patients with nasal polyps.
H. sapiens	hg19_human-all22-tissues	22	179 532	Genome-wide APA sites and 3′-UTRs, selection of heterogeneous cleavage sites in human 20 tissues.

^aTotal number of subsets integrated into a searching dataset.

^bDetail descriptions of experimental samples can be referred (Supplementary Notes, or http://mosas.sysu.edu.cn/utr/search_APASdb.php?show=1).