CT45A1 and colorectal carcinoma: Heterotypic CIC structures generated by unlabeled NK‐92MI cells and mCherry‐labeled, vec‐expressing CRC cells or Venus‐labeled, CT45A1‐expressing cells were observed 1 h after NK cell seeding (Fig. S4A, white arrows), and unexpectedly, enhanced heterotypic CIC structures were observed when NK‐92MI cells were cultured with CT45A1‐expressing CRC cells (Fig. S4B).