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Bio-Rad Laboratories StarBright Violet 515 Dye for Flow Cytometry

Bio-Rad Laboratories has launched the StarBright Violet 515 (SBV515) dye, the first of a new range of fluorescent nanoparticles for flow cytometry. SBV515 has an excitation maximum at 401 nanometers and emission maximum of 516 nanometers, offering improved brightness to better resolve rare and low antigen density populations. It has a narrow emission profile to reduce spillover into neighboring filters and minimize excitation by other lasers, making it suitable for inclusion in multicolor panels. The dye is not susceptible to photobleaching, delivers high lot-to-lot reproducibility, and is stable at 4° C with no loss of signal, Bio-Rad said.

The Scan

Tens of Millions Saved

The Associated Press writes that vaccines against COVID-19 saved an estimated 20 million lives in their first year.

Supersized Bacterium

NPR reports that researchers have found and characterized a bacterium that is visible to the naked eye.

Also Subvariants

Moderna says its bivalent SARS-CoV-2 vaccine leads to a strong immune response against Omicron subvariants, the Wall Street Journal reports.

Science Papers Present Gene-Edited Mouse Models of Liver Cancer, Hürthle Cell Carcinoma Analysis

In Science this week: a collection of mouse models of primary liver cancer, and more.