Anti-CRISPRdb v2.2: an online repository of anti-CRISPR proteins including information on inhibitory mechanisms, activities and neighbors of curated anti-CRISPR proteins. - Chuan Dong; Xin Wang; Cong Ma; Zhi Zeng; Dong-Kai Pu; Shuo Liu; Candy-S. Wu; Shixin Chen; Zixin Deng; Feng-Biao Guo (Database J. Biol. Databases Curation, 2022)