Sos Apr 2026

: Triggered by the presence of single-stranded DNA (ssDNA), the response activates the RecA protein, which leads to the cleavage of the LexA repressor. This allows the expression of over 40 genes involved in DNA repair.

: It was first adopted in the early 20th century, specifically at the International Radio Telegraphic Convention in Berlin in 1906, to replace the earlier "CQD" signal. : Triggered by the presence of single-stranded DNA

: While it saves the cell, the process is often error-prone. This "mutator phenotype" can lead to increased genetic variability, which is a key driver for the evolution of antibiotic resistance . 3. Engineering: System of Systems (SoS) the response activates the RecA protein