The program compares nucleotide or protein sequences to sequence databases and calculates the statistical significance of matches.
程序会把核苷酸或者蛋白质的序列与序列数据库相比较，并计算符合的统计学意义。
2
These structures contain short nucleotidesequences that find the most conservative molecules among all RNA molecules, that is, sequences that do not change quickly and are important to the virus.
这些片断中包含在所有RNA分子中最为稳定的短核苷酸序列，这种RNA序列变化缓慢且对病毒很重要。
3
The aligned sequences were calculated for nucleotide differences.