| Promoter sequences promote the ability of RNA polymerases to recognize the nucleotide at which initiation begins. |
| Consistent with the close phylogenetic relationships of the species sampled, most nucleotide sites were invariant in pair wise comparisons. |
| This happens in the case that the candidate sequence is identical to the most conserved nucleotide at every position of the consensus matrix. |
| Sequencing of a kilobase region of the gene cubitus interruptus Dominant in 10 lines of D. melanogaster showed no nucleotide substitutions. |
| This allowed the purification and sequencing of six positive clones containing the previously determined nucleotide sequence. |
| Replicative DNA polymerases are very accurate enzymes with error rates usually in the range of 10-5 per replicated nucleotide. |
