The phrase "a number of duplication" is not correct in English.
The correct expression would be "a number of duplications" if referring to multiple instances of duplication.
Example: "In the report, we found a number of duplications that need to be addressed to ensure accuracy."
Alternatives: "several instances of duplication" or "multiple occurrences of duplication."
This spectral multiplication is partly based on a number of duplication events of the opsins.
In Drosophila, Kern found a number of duplication and deletion polymorphisms in this region [ 14].
The clustering analyses suggest that a number of duplication events accompanied the phylogenetic history of CRF proteins.
Thus, the AMT2 subfamily of ammonium transporters in Citrus comprised, at least, 3 proteins, suggesting the occurrence of a number of duplication events.
Previous data from available insect genomes have shown that while ac-sc genes have undergone a number of duplication events, all species analyzed bear a single ase gene.
Together, 8 HOG pathway genes had a 1 1 orthology relationship, while the remaining 11 genes underwent a number of duplication or loss events (15 duplications, 2 loss, and 4 pseudogenization events; Figure 2).
This suggests that there have been a number of duplications in the ASP-1 lineage in C. elegans since its divergence from C. briggsae.
However, mean percent identities might be misleading since the genes encoding both subunit genes of AGPase underwent a number of duplications after the initial duplication that generated the two subunits.
Our phylogenetic analysis identifies a number of domain duplication and rearrangement events, and shows a single convergent event during evolution of the PDZ/LIM family.
Additionally, the presence of multiple Class II isoforms in many organisms that were placed together within single species, or intermixed with taxonomically closely related species (as exemplified in A. thaliana and S. cerevisiae) suggests that the trehalose synthetic gene family has undergone expansion by a number of gene duplication events at different taxonomic levels.
The cytosolic GOT1 proteins have undergone a number of gene duplication events in copepods and in the T. californicus lineage.
