Table 1.

Perfect Loopless Inverted Repeats from Size 4 bp to 60 bp in Chromosome III or Random Sequence

Length	Sum of non-AT-rich chrom. III	Sum of non-AT-rich using random sequence	Sum of AT-rich chrom. III	Sum of AT-rich using random sequence	Sum of CG-rich chrom. III
4	209440	242685	298769	410408	54611
5	349726	389475	270417	262959	23093
6	72480	91991	83467	84158	4700
7	119561	122669	71285	53441	2627
8	25272	30044	21354	17433	640
9	39526	36172	17258	11198	246
10	9367	9332	6426	3402	132
11	13435	10526	5356	2292	35
12	3477	2760	2151	703	39
13	5163	2947	1990	450	7
14	1509	795	939	146	7
15	1844	902	755	96	4
16	597	186	402	29	1
17	630	238	299	21	0
18	217	76	199	2	0
19	256	60	102	3	0
20	108	19	116	3	0
21	106	16	40	0	0
22	61	2	64	0	0
23	43	2	4	1	0
24	43	1	44	0	0
25	16	2	4	0	0
26	9	0	41	0	0
27	6	0	0	0	0
28	9	0	32	0	0
29	4	0	3	0	0
30	14	0	31	0	0
31	5	0	0	0	0
32	5	0	29	0	0
33	3	0	0	0	0
34	2	0	27	0	0
35	1	0	0	0	0
36	2	0	22	0	0
37	0	0	0	0	0
38	4	0	19	0	0
39	2	0	0	0	0
40	0	0	18	0	0
41	0	0	0	0	0
42	1	0	15	0	0
43	0	0	0	0	0
44	0	0	11	0	0
45	0	0	0	0	0
46	9	0	6	0	0
47	0	0	0	0	0
48	0	0	6	0	0
49	0	0	0	0	0
50	0	0	5	0	0
51	0	0	0	0	0
52	0	0	4	0	0
53	0	0	0	0	0
54	1	0	4	0	0
55	0	0	0	0	0
56	0	0	4	0	0
57	0	0	0	0	0
58	0	0	4	0	0
59	1	0	0	0	0
60	0	0	4	0	0

“AT-rich” and “CG-rich” are defined as being comprised of those bases exclusively. “Non-AT-rich” sequences are heterogeneous in respect to base content. “Perfect” repeats of odd length are defined as including a single base at the central position but otherwise show complete base pairing in the stem. Perfect repeats of even length have no mismatches. Random files for analysis were generated with 36% GC content.

An Annotated Catalog of Inverted Repeats of Caenorhabditis elegans Chromosomes III and X, with Observations Concerning Odd/Even Biases and Conserved Motifs