'its highest expression' is a correct and usable phrase in written English.
It can be used when referring to something that has been expressed as strongly or powerfully as possible. For example, you could say: "This song is a beautiful example of love in its highest expression."
From there it spread to Tuscany, where it reached its highest expression in the 14th century in the poems of Petrarch.
While Myc is expressed at low levels in prepubertal and virgin glands, it reaches its highest expression levels between days 6.5 and 12.5 of pregnancy, after which the RNA level slowly returns to baseline until parturition [ 20].
Being and Time is a long hymn of praise to possibility and it finds its highest expression in being-towards-death.
It reached its highest expression in the National Gallery of Art's East Building, a composition of angular stone forms completed in 1978 that remains the most visible emblem of modern Washington.
But this was not "a transgression of a law of nature"; it was human nature in its highest expression.
In developing grains, it was found that TaLCYB reached its highest expression at 20 25 DAP (Grain 4), suggesting that at later developmental stages grains may also have high ability to synthesize β-carotene compared with the early stages.
As shown in Figure 3-A, DS was highly expressed in all selected tissues, and its highest expression was found in flowers.
Traditional moral sense theory linked ethical behavior to an innate property or instinct that was considered universal in human beings, even though it required education and cultivation to reach its highest expression.
ABCC1 was expressed at low levels in all tissues; its highest expression levels were in SPPI and gills (about 10 RPM).
For example, VLGR1 had its highest expression in the proximal ileum, but it was not detected in the distal segment.
The freedom it manifests, however, is a profoundly inward freedom that finds its highest expression and articulation not in art itself but in religious faith and philosophy.
