080 123 O - 7z

The "7z" portion of your query most likely refers to the , which is a high-compression, open-architecture file format. It is common for large genomic datasets or research "feature" files to be stored in .7z archives because they support massive file sizes—up to 16 billion gigabytes—and offer high compression ratios using the LZMA algorithm . Does 7z compress better than zip? - Microsoft Community Hub

KZ phage, and 123 refer to specific proteins (ΦKZ080 and ΦKZ123) that are subunits of a non-virion RNA polymerase (nvRNAP) . These subunits have been identified as part of a cluster that takes over transcription during later stages of infection in a host. Feature Overview 080 123 O 7z

These proteins cluster together with other subunits (such as ΦKZ055, -068, and -071), validating their role as functional interaction partners within the nvRNAP complex. The "7z" portion of your query most likely

The nvRNAP, including subunits ΦKZ080 and ΦKZ123, allows the phage to continue transcription in a fashion independent of the host's own RNA polymerase. - Microsoft Community Hub KZ phage, and 123