Validation of endogenous U6 promoters for expanding the CRISPR toolbox in Nicotiana tabacum. - Luo, Pan; Li, Siyuan; Li, Lulu; Li, Yanyan; Qiao, Ying; Wu, Xianzhi; Wu, Meiling; Song, Zhihao; Yang, Yong; Feng, Ji; Tang, Xingchun (In Vitro Cellular & Developmental Biology Plant, 2024)