Pseudouridimycin (PUM) is an antibiotic that inhibits bacterial RNA polymerase (RNAP). It is a nucleoside analog that is effective against both Gram-positive and Gram-negative bacteria. PUM has a low rate of resistance acquisition and a wide range of antibacterial activity. It is shown that PUM particularly inhibits bRNAP in vitro, with an IC50 of ∼0.1 μM and also with a minimum inhibitory concentration (MIC) of 4 to 6 μg/mL. In vitro bactericidal activity is reported for PUM against drug-sensitive, drug-resistant, and multidrug-resistant Streptococcus species.

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.