序列操作套件 SMS2：
合并 FASTA
把多条 FASTA 序列合并为一条序列。
载入示例数据
填充示例序列，方便快速体验
Paste the FASTA sequences into the text area below. Input limit is 500,000,000 characters.
>9 base sequence accgactrm >20 base sequence gggggaaaaatttttccccc