These are DNA coding sequences in the human genome build GRCh38, downloaded from ensembl with the following R script:
install biomartr 1.0.7 from CRAN
install.packages("biomartr", dependencies = TRUE)
Install Biostrings if not installed
if (!requireNamespace("BiocManager", quietly = TRUE)) {
install.packages("BiocManager")
}
Load required package
library(Biostrings)
library(biomartr)
download the genome of Homo sapiens from ensembl