Hi, i am posting the source file content and my intermediate code , i have written.

This is the source file content

LOCUS       YP_001648463             258 aa            linear   INV 17
+-JUN-2009
DEFINITION  cytochrome c oxidase subunit II [Ephydatia muelleri].
ACCESSION   YP_001648463
VERSION     YP_001648463.1  GI:164420795
DBLINK      Project: 28177
DBSOURCE    REFSEQ: accession NC_010202.1
KEYWORDS    .
SOURCE      mitochondrion Ephydatia muelleri
  ORGANISM  Ephydatia muelleri
            Eukaryota; Metazoa; Porifera; Demospongiae; Ceractinomorph
+a;
            Haplosclerida; Spongillidae; Ephydatia.
REFERENCE   1  (residues 1 to 258)
  AUTHORS   Lavrov,D.V., Wang,X. and Kelly,M.
  TITLE     Reconstructing ordinal relationships in the Demospongiae u
+sing
            mitochondrial genomic data

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This is the program , i have written

use strict;
use warnings;

open (PROTEIN,"<invertebrate.protein.gpff") or die $! ; 

my @prot=<PROTEIN>;

my $protlen=$#prot;
my $version="VERSION";
my $dbsource="DBSOURCE";
my $protname;
my $rna;

for(my $i=0;$i<=$protlen;$i++)
{
    if((substr($prot[$i],0,7)) eq $version)
    {
    # have to store the value of "YP_001648463.1" in $protname
    }
    if((substr($prot[$i],0,8)) eq $dbsource)
    {
    # have to store the value of "NC_010202.1" in $rna
    }
}

close PROTEIN;

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My required strings are mentioned in the commented lines of the IF statement.Can someone tell me, how to extract this data and store in those respective scalars

In reply to Extract the matching strings by sundeep

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