PCR and qPCR: Provides pH 8.0 buffering and 2 mM Mg2+ during reaction setup or dilution of Mg-free components.

Restriction Digests and DNA Processing: Serves as a dilution/storage buffer for DNA and enzymes that require Mg2+ prior to adding specific reaction buffers.

Enzyme Assays: Supports Mg2+-dependent enzymes (e.g., polymerases, nucleases, kinases) with stable pH and osmoprotection from 4% sucrose.

Cell and Protoplast Handling: Used as an osmoprotective resuspension/wash buffer for bacteria such as E. coli and Bacillus subtilis, helping stabilize membranes during centrifugation and manipulation.

Bacteriophage Work: Employed for dilution or short-term storage of phage preparations where Mg2+ and sucrose help maintain particle stability.

Protein Stabilization: Used as a storage/dilution buffer for Mg2+-binding proteins and complexes, with sucrose aiding stability during handling and freeze-thaw.