HSPG2 and hepatocellular carcinoma: To provide further insights into the molecular mechanisms of circLARP1B and HNRNPD in HCC cells, we extracted cytoplasmic fractions of PLC cells and performed HNRNPD RIP of endogenously expressed HNRNPD, and the RNAs from RIP were subjected to RNA‐seq (RIP‐seq) (Figure S6a,b, Supporting Information).