Table 2.

Diffusion coefficients for tubulin and neurofilament proteins in the squid giant axon and in buffer solution

Exp.	D, μm2/s
	Tubulin	Neurofilament
Axon	8.591  ± 1.706 (7)	0.429 ± 0.345 (8)
Axon/Noc	10.39  ± 1.582 (7)
Axon/MP	8.852  ± 1.820 (6)	0.253 ± 0.148 (7)
Buffer	43.44  ± 13.92 (6)	4.730 ± 1.720 (8)

The diffusion coefficients did not differ between normal axons and those that were metabolically poisoned (MP) or treated with nocodazole (Noc) (P > 0.05). Values are mean ± SD with the number of axons in parenthesis.