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Molecular Weight Markers
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Molecular Weight Markers

Introduction to Molecular Weight Markers

BioChain provides a series of DNA molecular weight markers. A molecular-weight size marker is a general term for protein ladder, DNA ladder, or RNA ladder. These various molecular weight markers consist of a set of standards that are useful for identifying the approximate size and migration rate of a molecule on the separation gels. BioChain’s molecular weight markers are prepared using highly specific molecular biology grade chemicals and our proprietary technology. Our 100-bp DNA Ladder Plus is a mixture of double-stranded DNA fragments with consistent sizes that display high accuracy. BioChain’s reference markers can be used on agarose or acrylamide gels to estimate the sizes of DNA fragments ranging from 75 to 3000 bp. We also make custom made molecular weight markers to your specified sizes and concentration. Please contact us for more details.


  • Accuracy - Each band resolved on a gel has the exact length as claimed
  • Easily distinguishable patterns with enhanced intensities of certain bands
  • Easy to remember the bp length of each band due to a gradient intensity on the gel
  • Quality Control

    Each lot of the ladder has been quantified with a spectrophotometer and checked on a 3% agarose gel to ensure the accuracy and sharpness of the bands.