ELAVL1 and malignant peripheral nerve sheath tumor: RIP analysis was performed using an anti-HuR antibody or control anti-IgG antibody and cytoplasmic extracts from human neurofibroma (n = 8) and MPNST (n = 12) samples from the aforementioned frozen cancer panel, and the isolated RNA was identified by microarray analysis (Supplemental Figure 2, A and B).