Both MAP-2 and β-III-tubulin displayed no notable expression trends over DPD 7–21, while β-III-tubulin still displayed 57% (n = 2, data not shown) expression in undifferentiated PC12 cells relative to DPD 7, likely a corollary to the known β-III-tubulin expression in pheochromocytoma [59]. This evidence concerns the gene MAP2 and pheochromocytoma.