The phrase "a first panel of" is correct and usable in written English.
It can be used when referring to the initial section or component of a larger set, such as in a report, presentation, or artistic work.
Example: "In the report, a first panel of data illustrates the trends observed over the past year."
Alternatives: "an initial panel of" or "the primary panel of".
Here we report on the successful synthesis of a first panel of Rv3 oligosaccharide derivatives.
Contestants were screened by a first panel of producers, who slipped in a few freakishly untalented performers to feed to Mr. Cowell's withering on-camera scorn.
We have designed an automated genotyping system using 96-well DNA microarrays for blood donation screening and a first panel of eight single-nucleotide polymorphisms to identify 16 alleles in four blood group systems (KEL, KIDD, DUFFY, and MNS).
A first panel of rabbits used for mapping was genotyped by direct sequencing for the deletion using primers F9/R9 (Table 3).
In a first panel of 384 SNPs conversion rate was 92% (354/384) and the overall sample call rate for the approved SNPs was 97.5%.
A first panel of 43 amplicons, each of 250 bp was designed, with a total length of 5045 bp (Panel A).
These wines were returned to Stellenbosch, where the lineup of suspects was handed over to a second panel of tasters.
Three of the new loci show evidence of linkage to a second panel of families, in which maternal effects and pleiotropy of linked phenotypes are seen.
A second panel of judges, including at least one member who is independent of GNM, will select the winner from all valid shortlisted entries on or before 30 December 2015.
10E8V2.0/iMab also potently neutralized 99% of viruses in a second panel of 200 HIV-1 isolates belonging to clade C, the dominant subtype accounting for ∼50% of new infections worldwide.
A second panel of isolates (n = 73) was used to assess the test specificity, and these isolates consisted of non-Newport Salmonella serovars (n = 25), and other epidemic serovars (n = 48).
