The phrase "a defined region of a" is correct and usable in written English.
It can be used in contexts where you are describing a specific area or section of something, often in scientific, mathematical, or technical discussions.
Example: "In the study of geography, we often analyze a defined region of a country to understand its climate and resources."
Alternatives: "a specified area of a" or "a designated section of a".
A subarray is a defined region of the CCD in which data will be taken, rather than the entire chip.
The noise was applied at a proximal site, on a defined region of the tibial nerve path above the ankle.
However, the use of a balancer chromosome (where a phenotypically marked segment of a chromosome is inverted) in a mutagenesis screen enables mutations to be mapped in a defined region of the genome and maintained stably in a heterozygous state.
* a defined region of canker radiating upward from the graft union on the north side of the tree.
A defined region of the 35S enhancer was revealed as a possible target sequence for the strict silencing apparatus by analysis of asymmetric methylation in transgenic plants having a single copy of unmodified- and modified 35S promoters.
We quantitated this by counting the number of bristles present within a defined region of the thorax of adult flies.
The Synovial Thickness Area (STA), a quantitative measure, is a count of the number of pixels within a defined region of interest (ROI) in a standardized two-dimensional image of the joint.
Delitto perfetto has an advantage over MIRAGE when the goal is to generate multiple mutants each with a different mutation within a defined region of the genome; this is because once the Gal-SceI CORE has been inserted into the genome, mutations can be introduced anywhere within a 100-200 bp of the CORE site simply by using different oligonucleotides in the second step.
The sample was spread onto 8 SuperFrost® Plus slides (VWR) by pipetting 150 uL of the mixture onto a slide resting in a manual spreading device (CyteSpreader®, RareCyte) that was designed to evenly distribute the sample in a monolayer across a defined region of the slide without making contact with the slide and thus minimizing sample loss (see Figure 2).
Sequence chromatograms showing a defined region of mixed peaks indicated differential splicing.
