TABLE 3 .

Size distribution of H3N2 leader RNAs^a

Length (nt)	No. of leRNAs of the indicated length derived from the following influenza vRNA segment:
	PB2	PB1	PA	HA	NP	NA	M	NS
18	33,567	8,512	15,097	6,858b	4,498	14,251	7,049	6,858b
19	115,343	10,093	15,888	15,330b	13,470	6,462	28,056	15,330b
20	36,539	18,962	34,487	3,742b	24,710	21,361	9,064	3,742b
21	70,309	28,898	70,226	7,308b	42,140	9,728	26,498	7,308b
22	82,197	12,056	105,011	7,526	46,306	8,184	16,255	5,247
23	22,272	20,949	63,814	2,878	48,082	15,643	11,174	6,664
24	42,376	16,307	26,101	5,006	42,786	14,607	1,500	2,296
25	32,327	34,429	24,996	14,640	42,608	15,033	2,002	7,152
26	75,262	32,694	8,399	5,673	12,353	3,100	3,346	5,094
27	51,910	9,173	9,574	3,125	5,053	4,798	326	3,745
Total	562,102	192,073	373,593	72,085	282,006	113,167	105,270	63,435

^aThis table presents the size distribution, in nucleotides, of the leRNAs derived from each of the indicated influenza vRNA segments, with the most prevalent size in boldface type.

^bBecause the HA and NS vRNAs are identical in sequence through nucleotide 21, we could not assign reads derived from these sequences unequivocally. We have therefore arbitrarily assigned 50% of the reads to each of these two segments.