MRC1 and cancer: This was crucial for in vivo use, so receptor cells would not report (self-)contactwith other neighboring cancer cells within the metastatic tumor mass.The CD206 expression cassette was transiently expressed in wild-typeMetBo2 cells and validated through immunostaining using αCD206-mNeonGreenchromobodies in an assay developed by Baronaite et al. (Figure 3B)27 (See Methods).