序列操作套件 SMS2：
蛋白区域提取

按指定位置或范围从蛋白质序列中提取片段。

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.

Enter the residue 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 residues of a sequence, the range '(end - 2)..end' can be used. To obtain the 30 bases on either side of the center residue along with the center residue, the ranges '(center - 30)..(center - 1), center, (center + 1)..(center + 30)' can be used.

  • Sequence segments should be returned as