Protein Markers & Ladders

NEB offers a selection of highly pure protein markers and ladders available in unstained or prestained (prestained containing two colored bands for easy identification) formats. Sizes range from 2.3 to 250 kDa which is ideal for accurate molecular weight determination for a wide range of expressed proteins. NEB markers and ladders provide uniform band intensities, convenient band spacing and easy-to-identify reference bands.

ColorPlus™ is a trademark of New England Biolabs, Inc.

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  • Protein Expression & Purification Brochure

    The Protein Expression and Purification brochure provides information on the advanced tools for protein expression and purification offered by NEB.

Legal Information
This product is covered by one or more patents, trademarks and/or copyrights owned or controlled by New England Biolabs, Inc (NEB).

While NEB develops and validates its products for various applications, the use of this product may require the buyer to obtain additional third party intellectual property rights for certain applications.

For more information about commercial rights, please contact NEB's Global Business Development team at

This product is intended for research purposes only. This product is not intended to be used for therapeutic or diagnostic purposes in humans or animals.