Does neurofilament phosphorylation regulate axonal transport?

Phosphorylation of neurofilaments has long been considered to regulate their axonal transport rate and, in doing so, to provide stability to mature axons. Interpretation of data recently obtained following C-terminal deletion experiments has prompted a challenge to this hypothesis. We present evidence that these deletion studies remain consistent with, rather than refute, a role for C-terminal phosphorylation in regulation of neurofilament axonal transport.