SMN1 and neuroblastoma: IP and GST pulldown SMN complex in human neuroblastoma SH-SY5Y cells using FLAG-tagged FMRP antibody. IP antibodies specific to human FMRP were used to pull down Dicer and associated miRNAs in an EBV-transformed human B cell line. IP was performed from total HeLa cell lysates with a monoclonal antibody to eIF2C2.