$string1='--------NNNNNNN--------NNNNN--------NNNNN------NNNNNNN------
+-------BBBBB-----';

[download]

should become
 
$string1_new='--------NNNNNNN--------NNNNN--------NNNNN------NNNNNNNBB
+BBBBBBBBBBBBBBBBBBBBB';

[download]

$string2='---------NNNNN-NNNNNNNNNNNNN----NNNNNNNNNNN---------BBBBBBBB
+BB';

[download]
should become 
$string2_new='---------NNNNN-NNNNNNNNNNNNN----NNNNNNNNNNNBBBBBBBBBBBBB
+BBBBBB';

[download]

$string3='-------NNNNNNN-----------------BBBBBBBBBBBBBBB-------------N
+NNNNNN';

[download]

should become 
$string3_new='-------NNNNNNNBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
+BBBNNNNNNN';

[download]

$string4='--------BBBBBBBBBBBB-------NNNNNNNNNNNNN------NNNNNN';

[download]

should become: 
$string4_new='--------BBBBBBBBBBBBBBBBBBBNNNNNNNNNNNNN------NNNNNN';

[download]

Does this make more sense? Thank you for the answer, I just don't get this "1" that you have there... I tried the:
    $initial_protein=~s/B-/BB/g;
    $initial_protein=~s/-B/BB/g;

[download]

but didn't work...

In reply to Re^2: How can I expand my substring? by Anonymous Monk
in thread How can I expand my substring? by Anonymous Monk

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