提取等差氨基酸序列位点

氨基酸序列

# 氨基酸序列：txt格式 60个每行

统计以15为分割的位点

awk 'BEGIN{FS="";OFS="\n";} {print $15,$30,$45,$60}' SpyCas9.txt > 15.txt

awk 'BEGIN{FS="";OFS="\n";} {print $8,$23,$38,$53}' SpyCas9.txt > 8.txt

awk 'BEGIN{FS="";OFS="\n";} {print $4,$19,$34,$49}' SpyCas9.txt > 4.txt

awk 'BEGIN{FS="";OFS="\n";} {print $12,$27,$42,$57}' SpyCas9.txt > 12.txt

FS 不设置分隔符

OFS 输出为每行一个