atp-promoted efflux of poly ( a ) -rich rna from isolated nuclei of prelabeled mouse lymphoma l5178y cells has an activation energy of 51.5 kj/mol , similar to that found for the nuclear envelope nucleoside triphosphatase ( 48.1 kj/mol ) assumed to be involved in mediating nucleocytoplasmic transport of at least some rna .
C0007610
nuclei of
C0028584
nuclear envelope