maltose
Make up a sterile 20% stock solution of maltose as follows:
| maltose | 20 g |
| H2O | to 100 ml |
Sterilize the solution by passing it through a 0.22-μm filter. Store the sterile solution at room temperature.
Maltose, an inducer of the gene (lamB) that encodes the bacteriophage λ receptor, is often added to the medium during growth of bacteria that are to be used for plating bacteriophage λ. Add 1 ml of a sterile 20% maltose solution for every 100 ml of medium.
