Table 4. Abundance of polycistronic messages in MRC-5 cells at 24 hours post infection.

	NS1	NS2	N	P	M	SH	G	F	M2
First gene only	16,863	10,324	8,310	9,923	7,960	4,112	3,159	3,577	4,165
First, Second gene only (%)	1,997 (11.8%)	212 (2.1%)	278 (3.3%)	169 (1.7%)	537 (6.7%)	14 (0.3%)	42 (1.3%)	271 (7.6%)	0
First, Second, third gene only (%)	30 (0.2%)	1 (0.01%)	5 (0.06%)	10 (0.1%)	1 (0.01%)	0	1 (0.03%)	0	0
First, second, third, fourth gene only (%)	3 (0.02%)	0	1 (0.01%)	0	0	0	0	0	0

This table shows the number of MRC-5 infected cell transcripts observed at 24 hours with either one gene (monocistronic) or with increasing numbers of whole additional genes present on individual mRNAs (polycistronic) after the indicated 5′ most gene. For each combination, the number of transcripts listed refers to those with the indicated structure.