molbiotools
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Molbiotools is a collection of free online apps:

DNA Sequence Tools
Text and Data Tools
Lab Calculators
Math Calculators

List Operations

A free tool which allows you to perform set operations (union, intersection and difference) on item lists.

List A

List B

Actions

Find intersection of the lists.

A ∩ B

Merge lists.

A + B

Subtract list B from list A.

A - B

Subtract list A from list B.

B - A
Perform actions in a case-sensitive way.
Subtract only the first match for each item
Remove all

Output

Save to File
Select All
Remove Duplicate Lines
Sort
Reverse Order
Shuffle
Clear All Fields