Table 1.

Proteins associated with supraspliceosomes.

Protein	Cells origin	References
snRNP proteins	Syrian Hamster; HeLa; TD40	[17,18,94]
hnRNP proteins	Syrian Hamster; HeLa; TD40	[17,18,94]
SR protein family	HeLa; 293T HEK; TD40	[10,14,17,18]
Additional regulatory splicing factors	HeLa; 293T HEK; TD40	[13–15,17,18]
hPRP19 complex	HeLa; DT40	[17,18]
3′-end processing components	HeLa; TD40	[17,18,39]
Cap binding proteins	HeLa; 293T HEK; DT40	[17,18,39]
A-to-I RNA editing enzymes	HeLa; 293T HEK; TD40	[17,43,95,96]
Microprocessor components	HeLa	[64]
mRNA export and surveillance components	HeLa; TD40	[17,18]
RNA metabolism	HeLa; TD40	[17,18]