The input data is like

>1elwA
AAAAAASSSSSSSSSSSSSSDDDDDDDDDDDFFFFFFFFFF
>1flwA
GGGGGGGGGGHHHHHHHHHHHHIIIIIIIIIIIIIIJJJJJJJJJJ
>1ghwA
KKKKKKKKKKLLLLLLLLLLMMMMMMMMMMNNNNNNNNNNOOOOO
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Where >1elwA, >1flwA, >1ghwA should be the keys of the hashes and the respective data should be the value of the hash. The code/sub for storing in the file is

#!/usr/bin/perl

my %seqInfo = ();

open(FILE, 'test.fasta');
{
while(<FILE>)
{
my $line = $_;
 if ($line =~ />.*/)
  {
  #print "$&\n";
  }
else
  {
  #print "$line\n";
  }
$seqInfo{$&} = $line;
print "$& => $line\n";
}
}
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and the output is

=> >1elwA

 => AAAAAASSSSSSSSSSSSSSDDDDDDDDDDDFFFFFFFFFF

 => >1flwA

 => GGGGGGGGGGHHHHHHHHHHHHIIIIIIIIIIIIIIJJJJJJJJJJ

 => >1ghwA

 => KKKKKKKKKKLLLLLLLLLLMMMMMMMMMMNNNNNNNNNNOOOOO
[download]

However according to my understanding the output should be like

>1elwA => AAAAAASSSSSSSSSSSSSSDDDDDDDDDDDFFFFFFFFFF
[download]

Maybe the file is not properly stored as keys and values :( :(