by Melissa Rohman, Northwestern University An in vivo genome-wide CRISPR-Cas9 KO screen identifying CTC-promoting genetic factors. (A) Experimental design of the genome-wide CRISPR-Cas9 KO screen focused on CTCs. (B) Primary tumor growth curves of the immunocompromised mice subcutaneously transplanted with either the TKOv3-transduced PC-3M cells or the control cells (n = 3 for each group)....