The phrase "a defined expression" is correct and usable in written English.
It can be used when referring to an expression that has a specific meaning or interpretation in a particular context.
Example: "In mathematics, a defined expression is crucial for understanding the underlying principles of the equations."
Alternatives: "a specified expression" or "a clear expression".
If we can prove a theorem not containing a defined expression after a definition has been introduced that could not be proved before, the definition is said to be creative.
EVE has a defined expression patterns in ganglion mother cells (GMC) and daughter neurons of identified neural precursor lineages NB1-1, 3-3, 4-2, and 7-1 [17], [18], [18], [18].
These mixtures were designed to have a defined expression signal ratio between them.
Gene expression was quantified by cycle threshold (CT) method, where expression was determined from the fractional number of cycles required to achieve a defined expression threshold.
In the following, we assume that ARPs on the cellular level are induced by a defined expression level of selected genes.
Our study shows that NUMB has a defined expression pattern in the ameloblast lineage cells, more specifically in the ameloblast progenitors and preamelobasts.
Wild-type mice exhibited a low but defined expression of MMP19 in the thymus (Fig. 6D).
This observation has brought forward the hypothesis that a unique and defined expression site for var gene transcription could exist in P. falciparum.
Then the unlikely sense of impending calamity returned: Lord Rothermere concluded by noting that "freedom of expression is a defining aspect of our democracy", which he went on to say that in other countries was "an unobtainable dream".
Either way, the 5xMY-HMY line provided an improved resource for defining expression patterns of CK and NRCK enhancer trap lines.
Peptide loading was analyzed by determining the SA-APC signal on cells gated on a defined HLA-DR expression.
