"loci of" is a correct and usable phrase in written English.
You can use it to refer to a particular place of origin, focus, or concentration. For example: "The loci of the conversation shifted from the past to the present."
Loci of transient extreme for product are also investigated.
1960's: St. Mark's Place and Washington Square are loci of the artist, writer and hippie culture.
Living in Brooklyn and then in Austin, Texas, I made coffee shops the loci of my movements.
Seventeen primers amplified microsatellite-containing loci of interest.
We calculated the r2 statistic, which is the correlation coefficient between two focal loci of interest.
You could say that it is the genius loci of Shanghai's alleys.
The parabolic lines are loci of conical cusps in the distorted smectic layer structure.
Genomic deletions and insertions in the targeting loci of PI3K genes.
Haston, C. K. & Tsui, L. C. Loci of intestinal distress in cystic fibrosis knockout mice.
The new normal: Multi-modal distributions signifying loci of vocalic stylization.
The loci of constant temperature (kT) are labeled by their value in keV.
