DNA Ladder

A DNA ladder (also known as a molecular size marker) is a standard solution of DNA fragments with known base pair (bp) lengths.

Key Features

• Purpose: Run alongside unknown DNA samples in agarose or polyacrylamide gel electrophoresis to estimate fragment sizes by comparing migration distance.
• Common Types: Available in distinct size ranges such as 50 bp, 100 bp, and 1 kb (1,000 bp) ladders to match your target amplicon or plasmid size.
• Ready-to-Use Formats: Often pre-mixed with loading dyes for direct gel loading and visual tracking of electrophoresis progress.
• Reference Bands: Features brighter or higher-intensity reference bands at specific intervals (e.g., 1,000 bp or 3,000 bp) for quick orientation.