TABLE 1

Base composition and RIP indices of various N. crassa sequences

Sequence	Percentage A+T (%)	^{^a}	^{^a}
Neurospora sequences^{^b}	46 ± 5	0.66 ± 0.23	1.21 ± 0.18
Punt^RIP1 (nt 74-1947)	66	1.32	0.56
dPunt (nt 50-1171)	49	0.65	1.29
Wild-type sequences
Mating type A (Glass et al. 1990)	50	0.54	1.33
0 (5S rRNA gene at ζ-η locus of Abbott 4A)	53	0.86	1.03
qa gene cluster (Geever et al. 1989)	49	0.64	1.26
am⁺ (Kinnaird Fincham 1983)	46	0.68	1.15
RIP-modified sequences
am^RIP2 (Singer et al. 1995)^{^c}	47	0.76	1.12
am^RIP3 (Singer et al. 1995)^{^c}	48	0.91	1.03
am^RIP4 (Singer et al. 1995)^{^c}	48	0.92	1.05
am^RIP5 (Singer et al. 1995)	49	1.06	0.98
am^RIP6 (Singer et al. 1995)	49	1.02	1.00
am^RIP7 (Singer et al. 1995)	49	1.13	0.93
am^RIP8 (Singer et al. 1995)	52	1.18	0.91
pEC25 (Cambareri et al. 1989)	49	1.29	0.75
pBJ20 (Cambareri et al. 1989)	53	1.35	0.87
ζ-η (Selker et al. 1993)	67	1.29	0.47

↵^a Boldface type indicates values that differ significantly from set of Neurospora sequences not modified by RIP.
↵^b Set of Neurospora sequences not modified by RIP. The means and standard deviations for the set calculated in 500-bp windows are listed.
↵^c Lightly mutated and not methylated de novo.