At the molecular level this phenotype has a different basis compared to "real" constitutive nirAc modification-of-function mutations (Cove and Pateman, 1969; Rand and Arst, 1978; Tollervey and Arst, 1981).
In addition, a slight but not significant modification of the mutation spectrum associated with an increase of G C to T A and A T to C G transversions was noticeable in the treated animals.
We previously observed in mouse lung, that bitumen fumes did not induce an increase of cII mutants, a modification of the mutation spectrum, nor the formation of DNA adducts.
A myristoylation in the glycine 2 residue is an important modification of Z. Mutations at this site completely abolish its capacity of driving the budding process, reflecting the importance of the interaction with membrane to promote budding [ 15, 16].
The method we describe here is reliable and versatile, enabling various types of genome editing in Escherichia coli and Salmonella enterica by straightforward modifications of the mutation cassette.
In addition, we used a modification of a sensitive mutation screening technique that we have previously developed to facilitate the rapid detection of LKB1 mutations (Janne et al, 2006).
In contrast, for the other PDF-Is which exhibit different chemical structure, the modification of LPS (via mutation, or EDTA addition) did not improve the activity.
We now realize that the strict Lamarckian scenario is extremely demanding in that a molecular mechanism must exist for the effect of a phenotypic change to be channeled into the corresponding modification of the genome (mutation).
On the other hand, we were unable to identify the single lysine residue for the modification as mutation of any of these lysine residues alone failed to abolish the signal (see Additional file 1).
The presence of Y-chromosome heterochromatin in males has been hypothesized to underlie differential sensitivity of male and female Drosophila to mutations affecting HP1 (Liu et al. 2005) and male-specific modification of heterochromatin by mutations affecting dosage compensation (Deng et al. 2009).
