In contrast, less condensed chromatin—which tends to be GC-rich and more transcriptionally active—incorporates less Giemsa stain, and these regions appear as light bands in G-banding.

Region 12q1 can be further subdivided into five subregions, designated 12q11 through 12q15, each of which corresponds to a band detected by Giemsa staining. Orally, these subdivisions are referred ...