although nf-l and nf-m polypeptides are normally expressed exclusively in postmitotic neurons , nf-l or nf-m polypeptides expressed in fibroblasts were efficiently assembled into intermediate filament arrays , thus demonstrating the competence of both nf-l and nf-m to assemble in vivo in the absence of additional neuron-specific factors .
C0021770
intermediate filament
C1455438
nf-l