Eric B.

"In E. coli, σ70 is the major, but not the only, sigma factor. The second sigma factor to be discovered was σ32, which participates in the expression of genes involved in the heat shock response.... more

In the case of mammals like giraffes and koalas, is that bacteria common on the plants they eat so when a baby starts to try to stick something besides its mother's milk in its mouth, it can't... more