Markers and Ladders

Protein Standards

New England Biolabs offers a selection of highly pure protein standards. Sizes range from 10 to 250 kDa which is ideal for accurate molecular weight determination for a wide range of expressed proteins. We offer a blue prestained protein standard, as well as a colored prestained protein standard with multi-colored bands for easy identification. Standards are provided pre-mixed with loading buffer and reducing agent.


Featured Products


  • Suitable for analysis of a wide range of expressed proteins
  • Uniform band intensities and convenient band spacing
  • Easy-to-identify reference bands