Table 1. Features in each category of the Feature Site Database consists of 10 different feature categories and consists of 336 total features.

Category	No. of features
Promoters	43
Regulatory sequences	63
Terminators	29
Selectable markers	25
Replication origins	11
Reporter genes	21
Affinity tags	26
Localization sequences	17
Two-hybrid genes	10
Miscellaneous features	91
Total	336