序列操作套件 SMS2：
DNA 区域提取
按指定位置或范围从 DNA 序列中提取片段。
载入示例数据
填充示例序列，方便快速体验
Paste a raw sequence or one or more FASTA sequences into the text area below. Input limit is 500,000,000 characters.
>sample sequence ttaatgacctttttttttttccatgccctcgaataggcttgagcttgccaattaacgcgcacgggctggccgggcgtataagccaaggtgtagtgaggttgcattatacatgccggcttgtgattaacgcatgccataggacggttaggctcagaacccgcaaccaatacacgtgattttctcgtcccctg
Enter the base positions or ranges to be extracted. Use ".." to represent a range, and use a comma to separate entries. The words 'start', 'end', 'center', and 'length' can be used in place of digits, to represent the beginning, end, middle, and length of the sequence. Arithmetic expressions can be included in the ranges. For example, to obtain the last three bases of a sequence, the range '(end - 2)..end' can be used. To obtain the 30 bases on either side of the center base along with the center base, the ranges '(center - 30)..(center - 1), center, (center + 1)..(center + 30)' can be used.
Obtain bases from the
direct
complement
strand.
Sequence segments should be returned as
a new sequence
separate FASTA records
uppercased text
lowercased text