The phrase "an insignificant proportion" is correct and usable in written English.
You can use it when you want to express how something is very small or limited compared to the whole. For example: "Only an insignificant proportion of the profits went to charity."
The modified NPs cause death of an insignificant proportion of cells.
Components such as carbon dioxide, hydrogen sulfide, nitrogen and helium constitute an insignificant proportion of natural gas composition.
Additionally, the in silico assessment of toxicity of the two datasets was carried out by use of eighty eight (88) toxicity end points predicted by Lhasa's expert knowledge-based system (Derek) [6], showing that only an insignificant proportion of the promising anticancer agents would be likely to show high toxicity profiles.
However, the overall structure observed is not best explained by the four broad regions of isolation defined by hydrodynamic models of dispersal within the Caribbean [9], as an insignificant proportion of mitochondrial genetic variation at both loci sampled is partitioned among these regions (Table 3).
The clinical effects of the spread of H275Y in seasonal influenza (H1N1) have been minimal because seasonal influenza (H1N1) now accounts for an insignificant proportion of influenza (15 ).
Although EGPA patients have been included as part of larger studies [ 8], they made up an insignificant proportion of total study subjects and results may not accurately reflect the quality of life of these patients.
She has another four weeks to do – could you please help?" These women represent a not insignificant proportion of the prison population who are not a "danger to the public".
In effect, that means anyone employing children as maids in India, a not insignificant proportion of the population, could be jailed for at least five years, while the vast network of "placement agents", who bring children from poor villages to work in India's towns and cities, could be put away for at least 14 years.
Only a statistically insignificant proportion of IRs in the S. cerevisiae genome contain long dinucleotide repeats, and their dinucleotide repeat contents do not correlate with copy length.
Yet, an AMOVA with groups defined a priori by the four connectivity regions of Cowen et al. (2006) shows a small and insignificant proportion of the variance at both loci partitioned among these regions (Table 2).
Mechanical causes are seen to represent a very small, insignificant proportion of the deprivation gap.
