$_ = '>gi|226694487|sp|Q1DF98.2|ATPF_MYXXD RecName: Full=ATP synthase subunit b; AltName: Full=ATP synthase F(0) sector subunit b; AltName: Full=ATPase subunit I; AltName: Full=F-type ATPase subunit b; Short=F-ATPase subunit b';

 print $1 if/(.+?)(?= RecName)/;