The phrase "assumed synonymous" is correct and usable in written English.
It can be used when discussing terms or concepts that are believed to have the same meaning or are treated as if they are the same.
Example: "In this context, the terms 'freedom' and 'liberty' are often assumed synonymous."
Alternatives: "considered equivalent" or "regarded as interchangeable."
Assuming synonymous mutations are subjected to almost strictly neutral selection, ω<1, ω=1, and ω>1 represent negative selection, neutral evolution, and positive Darwinian selection, respectively [ 65].
ω is the nonsynonymous to synonymous rate ratio, also known as Ka/Ks or Dn/Ds, and is widely used as a measure of selective pressures on proteins assuming synonymous neutrality: ω<1 indicates negative selection, ω = 1 indicates neutrality, and ω>1 indicates positive selection.
We assumed that synonymous sites were neutral, except when we estimated the strength of selection on synonymous mutations (see below).
Researchers have assumed that "synonymous" mutations don't matter.
No selection is assumed for synonymous substitutions; w ab = 0 for a = b.
We assumed that synonymous substitutions are nearly neutral and used them to estimate the divergence time.
It has long been assumed that synonymous SNPs are inconsequential, as they do not lead to a change in primary polypeptide sequence.
If it is assumed that synonymous substitutions are under almost strictly neutral evolution, dN:dS = 1, dN:dS <1 and dN:dS >1 will represent neutral evolution, purifying selection and positive Darwinian selection, respectively.
Further, it was assumed that synonymous substitutions creating inefficiently translated codons would have no perceptible phenotypic effect except in very highly expressed genes, making such mutations effectively invisible to natural selection [ 9, 14].
Generally, it is assumed that synonymous substitutions among lineages (genes) accumulate through a neutral or nearly neutral process, and by comparing this rate of accumulation to that for non-synonymous substitutions it is possible to ask whether the non-synonymous substitutions accumulate more (diversifying or positive selection) or less (constrained) than the neutral rate.
