MRC1 and neoplasm: For in vivo imaging, the γ‐emitter [99mTc(H2O)3(CO)3]+ was complexed by the hexahistidine sequence of the anti‐MMR Nb‐IMDQ conjugate, following an established radiolabeling procedure, to enable single‐photon emission computed tomography/microCT (SPECT/μCT) imaging.[29, 48, 49] 99mTc‐anti‐MMR Nb‐IMDQ was injected intravenously in LLC‐OVA tumor‐bearing WT or MMR‐KO mice with or without a fivefold molar excess of cold, non‐labelled bivalent anti‐MMR Nb.