>NM_030643.4 Homo sapiens apolipoprotein L4 (APOL4) 
GAGGTGCTGGGGAGCAGCGTGTTTGCTGTGCTTGATTGTGAGCTGCTGGGAAGTTGTGACTTTCATTTTA
CCTTTCGAATTCCTGGGTATATCTTGGGGGCTGGAGGACGTGTCTGGTTATTATATAGGTGCACAGCTGG
>NM_001198855.1 Homo sapiens cytochrome P450 family 2 subfamily C member 8 (CYP2C8)
ACATGTCAAAGAGACACACAC
>NR_029834.1 Homo sapiens microRNA 200a (MIR200A), microRNA
CCGGGCCCCTGTGAGCATC
>AC067940.1 Homo sapiens clone RP11-818E9, LOW-PASS SEQUENCE SAMPLING
AAATACAACTTTAAATCAAAACGGTAAAAATTCCACTCTTTCATACTAACTTCAAAAGTATTTGCTTTAA
AAAAAAAGNNNNNNNNN

##</code><code>##

open(GENBANK, "/Users/Desktop/Genes.fasta") or die; 
my $content = join("", <GENBANK>); 
close(GENBANK);

sub mysub{
return shift =~ /(\w+\W+)\n/g;
 
}
my @matches = mysub($content);
print "@matches\n";