The phrase "a small region in" is correct and usable in written English.
It can be used when describing a specific, limited area within a larger context, such as geography, science, or any field where spatial dimensions are relevant.
Example: "The researchers focused on a small region in the Amazon rainforest to study the effects of deforestation."
Alternatives: "a limited area in" or "a minor section in".
A small region in HMG I(Y) is critical for cooperation with NF-kappaB on DNA.
The proposed methodology was applied to a small region in Seatwen District, Taichung City, Taiwan.
Seeing words involves the activity of neural circuitry within a small region in human ventral temporal cortex known as the visual word form area (VWFA).
The Yellow-shouldered Blackbird currently is confined to a small region in southwestern Puerto Rico, and on Mona Island. 1. Loss of natural feeding habitat.
(We've featured her research in the past). She found Pedalino's naturalization papers that indicate that he came from Quadrelle province, a small region in the Italian foothills.
Here, we introduce ρ-HESS, a technique to quantify the correlation between pairs of traits due to genetic variation at a small region in the genome.
The push-out test results suggest that the application of SFRCC promises larger shear forces transferred through studs arrayed in a small region in the slab.
Albariño is most prominently identified with Rias Baixas (pronounced REE-yas BUY-shas), a small region in Galicia in northwestern Spain.
The Marianna lowlands constitute a small region in the northwestern panhandle, bounded on the east by the Apalachicola River and on the west by the Choctawhatchee River.
The study on skin color distributions in different color spaces indicates that skin colors cluster in a small region in a color space.
Identification of the general pattern in diversity also made the exceptions quite clear, including the high diversity in the Driftless Area of Wisconsin, a small region in the southwestern part of the state.
