These observations were confirmed in differentiated SH‐SY5Y neuroblastoma cells (Figure S6A,B, Supporting Information), with similar distributions of CPs (0.32 ± 0.18, 0.22 ± 0.19, 0.46 ± 0.15 for singly‐, doubly‐capped holoenzymes and free particles, respectively), whereas RPs were found with a somewhat decreased fraction of free particles (0.25 ± 0.16, 0.31 ± 0.26, 0.45 ± 0.20). Here, CAD is linked to neuroblastoma.