Lamprey neurofilaments combine in one subunit the features of each mammalian NF triplet protein but are highly phosphorylated only in large axons.

Pleasure SJ, Selzer ME, Lee VM. Lamprey neurofilaments combine in one subunit the features of each mammalian NF triplet protein but are highly phosphorylated only in large axons. J Neurosci. 1989 Feb; 9(2):698-709.

1989
http://profiles.ucsf.edu/profile/213560
2493079

Pleasure SJ, Selzer ME, Lee VM