To demonstrate the strength of CASB in scRNA‐seq, a breast cancer cell line MDA‐MB‐231 was perturbed with 5 different compounds, collected at 3 different time points after treatment, and pooled with 3 other breast cancer cell lines as well as MEF cells after separate sample labeling using CASB (Fig 2B). The gene discussed is CSN2; the disease is breast carcinoma.