The phrase "a common mark" is correct and usable in written English.
It can be used to refer to a shared characteristic or feature that is recognized by a group or community.
Example: "The use of a common mark among the participants helped to establish a sense of unity and identity."
Alternatives: "a shared symbol" or "a typical sign".
The new rules "should improve the traceability of firearms on EU territory by adopting a common marking system, more rigorous framing of internet firearms sales, banning 3D printouts for firearms on the internet", and the electronic tagging of firearms to facilitate the tracking of a weapon's lifecycle anywhere in the EU.
One common mark of a "follower" is being complacent and avoiding change, sticking to the same old drugery.
All persons being discriminated against by a law must share a common identifying mark that is not borne by those not discriminated against.
In DNA of metazoa, 5mC is a common epigenetic mark associated with gene silencing, which can be reversed by active DNA demethylation.
Methylation of histone H3-Lys9 is a common histone mark generally associated with an inactively transcribed promoter.
Recent evidence suggests that β-cells from T2D patients show altered DNA methylation (a common epigenetic mark) with changes in gene expression profiles [ 38].
It would have been ideal if the authors had taken pictures 4 and 7 as well as 6 and 7 with a common guide mark (for scale) on the ground.
These findings suggest that the variable nucleotides immediately flanking GC42 are likely the co-conversion tract of GC42 insertion, a common sequence mark of insertion for many mobile sequences, e.g., group I and group II introns (Lambowitz and Belfort 1993; Moran et al. 1995; Sanchez-Puerta et al. 2008).
Though this use is not as common today, the hyphen was once a common punctuation mark on typewriters, used when a long word had to be split between two lines.
In plants, the most common mark of DNA methylation is 5-methylcytosine (5-mC) [ 3].
