Table 8.

Actual versus theoretical n-peptide occurrences in viral and human proteins

Peptidea (n-mer)	Theoretical numberb (×106)	Actual occurrences
		1	2	3	4	5	6	7	8	9	10
5	3.2	257,035	299,701	42,666	254,808	299,749	44,941	42,647	56,230	234,691	2,907,096
6	64	282,932	298,966	16,034	286,515	299,058	12,543	4,394	5,089	87,224	259,655
7	1,280	284,918	298,232	13,314	289,592	298,367	8,775	455	617	10,863	31,737
8	25,600	284,857	297,498	12,641	289,744	297,676	7,932	80	163	1,668	8,805
9	512,000	284,497	296,764	12,267	289,486	296,985	7,499	30	81	656	4,035
10	10,240,000	284,022	296,030	12,008	289,096	296,294	7,198	14	27	437	1,311
11	204,800,000	283,494	295,296	11,802	288,629	295,603	6,974	8	9	352	661
12	4,096,000,000	282,926	294,562	11,636	288,121	294,912	6,791	5	5	292	449
13	81,920,000,000	282,341	293,829	11,488	287,578	294,223	6,645	3	3	240	316
14	1,638,400,000,000	281,735	293,096	11,361	287,017	293,535	6,518	1	1	204	254
15	32,768,000,000,000	281,116	292,363	11,247	286,441	292,847	6,406	0	0	171	207
16	655,360,000,000,000	280,478	291,630	11,152	285,842	292,160	6,318	0	0	148	176

Column number: (1) actual unique n-mers in the 30 viral proteomes; (2) actual n-mers in the 30 viral proteomes (including multiple occurrences); (3) number of repeated n-mers in the 30 viral proteomes; (4) actual unique n-mers in the 30 human sub-proteomes; (5) actual n-mers in the 30 human sub-proteomes (including multiple occurrences); (6) number of repeated n-mers in the 30 human sub-proteomes; (7) unique viral n-mers overlaps in the 30 human sub-proteomes; (8) total viral n-mers overlaps in the 30 human sub-proteomes (including multiple occurrences); (9) unique viral n-mers overlaps in the human proteome; (10) total viral n-mers overlaps in the human proteome (including multiple occurrences).

^aPeptide length, with n from 5 to 16 amino acids.

^bThe number of possible amino acid combinations is given by 20ⁿ.