Table 1. Statistical summary of the transcriptome data and assembled unigenes of each amphibian skin library.

Species	A. davidianus	B. gargarizans	R. Hallowell
Clean reads	119,269,618	117,350,510	111,152,846
Clean bases	17,823,923,530	17,459,971,361	16,613,432,806
Clean GC%	48.62	46.78	45.33
Clean Q20%	98.89	98.8	98.82
Total number of unigenes	167,064	271,117	260,306
Total bases of unigenes	108,231,106	148,546,509	148,234,961
Mean length (bp)	647.84	547.91	569.46
Median length (bp)	360	343	349
N50 length (bp)	956	635	693