The phrase "a major cluster" is correct and usable in written English.
It can be used to describe a significant grouping or collection of items, events, or data points that are closely related or connected in some way.
Example: "The research identified a major cluster of symptoms that were common among patients with the same condition."
Alternatives: "a significant group" or "a large collection".
"It's a major cluster of injuries".
The image shows Montreal as a major cluster of lights.
They formed a major cluster with Helicobacter, separate from the other urease-producing bacteria examined, suggesting a shared ancestry between UPTC and Helicobacter.
MLM analysis for amylose content detected 61 significant markers with a major cluster on chromosome 6.
A major cluster related to rice domestication seems to be located on the different position from ours (Li et al. 2006b).
Phylogenetically, KT71T is affiliated to a major cluster of environmental 16S rRNA gene sequences that were retrieved mainly from marine habitats.
To show the actual improvement in practice, however, will likely require a major cluster-randomized trial of the type historically required before public investment in large-scale national programs, such as for vaccines.
Most of them were grouped in Clusters A and C. The expression levels of the genes in both of these clusters reached a minimal expression level at 24 hpi followed by either a minor (Cluster A) or major (Cluster C) recovery by 72 hpi (Table 1).
This is particularly clear in the case of far-Western blotting (Fig. 2B), where two major clusters consist entirely of cells with wt K-RAS, whereas a third major cluster (cluster 3) consists almost entirely of cells with wt EGFR but mutant K-RAS.
A second major cluster of lyssaviruses consists of IRKV, DUVV and EBLV-1.
Many of the control samples formed a single major cluster, while the remaining control samples were interspersed among the LVL subjects in two other major clusters.
