Finally i have come with a code that could do my work of parsing an UniProt File nad getting the terms....Hope this code could be useful to others... Thanks to all who helped me out in this node. 

 $/ = "//";
$count = 0;
while ($chunkData = <>) {
    @data = grep {$_ !~ /^\s*$/} map {/.+?\=(.+?);/g} grep {$_ =~ /^DE
+.+?\=(.+?);|^GN.+?\=(.+?);/} split ("\n", $chunkData);
        foreach $term (@data) {
        next if ($term =~ /Putative uncharacterised protein/);
        if ($term =~ m/\,/g) {
            foreach (split (/\,\s/, $term)) {
                $hash{lc ($_)}++;
                next if $hash{lc ($_)} > 1;
                $count++;
                print "$count ";
                print lc($_)."\n";
                }
            } elsif ($term =~ /(.+?)\((.+?)\)/g) {
                $hash{lc ($1)}++;
                next if $hash{lc ($1)} >1;
                $count++;
                print "$count ";
                print lc($1)."\n";
                $hash{lc ($2)}++;
                next if $hash{lc ($2)} >1;
                $count++;
                print "$count ";
                print lc($2)."\n";

            } else {
            $hash{lc ($term)}++;
            next if $hash{lc ($term)} > 1;
            $count++;
            print "$count ";
            print lc ($term)."\n";
        }
    }
print "\n";
}

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In reply to Re^2: how to parse a UniProt Flat file by stanleysj
in thread how to parse a UniProt Flat file by stanleysj

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