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seqtk是Heng Li开发的一个处理序列的程序,非常方便快速。这个工具之前是整合在SAMtools源代码包中的,但是在2013年3月19日SAMtools更新到0.1.19版本后,这个工具被移除了,很奇怪。不过,这个seqtk工具是可以单独下载安装的。
git clone https://github.com/lh3/seqtk.git
下面是seqtk的用法
Usage: seqtk <command> <arguments>
Command: comp get the nucleotide composite of FASTA/Q
hety regional heterozygosity
fq2fa convert FASTQ to FASTA
subseq extract subsequences from FASTA/Q
maskseq mask sequences
mutfa point mutate FASTA at specified positions
mergefa merge two FASTA/Q files
randbase choose a random base from hets
cutN cut sequence at long N
listhet extract the position of each het
参考资料:
Using seqtk to trim and process reads at an insanely high speed
Biostar: How to obtain and install seqtk
http://samtools.sourceforge.net/
https://github.com/samtools/samtools
http://sourceforge.net/projects/samtools/files/
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