Table 2.

Base composition in SNS and pre-RC zones

Zone type As Ts Gs Cs CG GC CC GG GC or CG TA AT AA TT AT or TA 
All pre-RC 0.206 0.232 0.284 0.277 0.050 0.073 0.083 0.086 0.124 0.034 0.043 0.044 0.053 0.077 
Top-pre-RC 0.204 0.218 0.294 0.285 0.055 0.078 0.089 0.090 0.134 0.032 0.040 0.042 0.046 0.073 
Bot-pre-RC 0.220 0.235 0.270 0.275 0.043 0.070 0.081 0.078 0.113 0.035 0.046 0.051 0.055 0.080 
All SNS 0.221 0.235 0.283 0.262 0.043 0.069 0.080 0.088 0.112 0.039 0.048 0.051 0.057 0.087 
TopSNS 0.223 0.243 0.276 0.257 0.042 0.066 0.082 0.081 0.108 0.041 0.051 0.050 0.066 0.092 
BotSNS 0.218 0.224 0.296 0.262 0.046 0.073 0.076 0.094 0.119 0.032 0.045 0.051 0.050 0.077 
Genome mean 0.203 0.214 0.301 0.282 0.054 0.079 0.090 0.101 0.133 0.032 0.041 0.043 0.048 0.074 
Zone type As Ts Gs Cs CG GC CC GG GC or CG TA AT AA TT AT or TA 
All pre-RC 0.206 0.232 0.284 0.277 0.050 0.073 0.083 0.086 0.124 0.034 0.043 0.044 0.053 0.077 
Top-pre-RC 0.204 0.218 0.294 0.285 0.055 0.078 0.089 0.090 0.134 0.032 0.040 0.042 0.046 0.073 
Bot-pre-RC 0.220 0.235 0.270 0.275 0.043 0.070 0.081 0.078 0.113 0.035 0.046 0.051 0.055 0.080 
All SNS 0.221 0.235 0.283 0.262 0.043 0.069 0.080 0.088 0.112 0.039 0.048 0.051 0.057 0.087 
TopSNS 0.223 0.243 0.276 0.257 0.042 0.066 0.082 0.081 0.108 0.041 0.051 0.050 0.066 0.092 
BotSNS 0.218 0.224 0.296 0.262 0.046 0.073 0.076 0.094 0.119 0.032 0.045 0.051 0.050 0.077 
Genome mean 0.203 0.214 0.301 0.282 0.054 0.079 0.090 0.101 0.133 0.032 0.041 0.043 0.048 0.074 

Summary of nucleotide features within enriched pre-RC and SNS zones. The numbers indicate the percentages of single nucleotides, dinucleotide pairs (AT, TA, GC, and CG), and of single dinucleotide pairs. The top and bottom values give the percentages of the strongest and weakest enrichment zones (n =19 for pre-RC; n = 17 for SNS).

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