Those datas are were previously available at  bios.dijon.inra.fr/FATAL/cgi/pscam.cgi. 
 Alves-Carvalho S, Aubert G, Carrère S, et al. Full-length de novo assembly of RNA-seq data in pea (Pisum sativum L.) provides a gene expression atlas and gives insights into root nodulation in this species. Plant J. 2015;84(1):1-19. doi:10.1111/tpj.12967
 
PsUniLowCopy_annot.fa -> mRNA sequences 
Peptides_PsUniLowCopy.fa -> Peptides sequences
PsUniLowCopy.iprscan.raw.goa ->  Annotation using Interproscan

PsUniLowCopy_count.tsv : Original count previously available on the portal
PsUniLowCopy_rpkmCorr.tsv :Original corrected rpkm previously available on the portal.

Those datas were produced to link the transcriptome to the first version of Pisum sativum genome.
Kreplak, J., Madoui, M., Cápal, P. et al. A reference genome for pea provides insight into legume genome evolution. Nat Genet 51, 1411–1422 (2019). https://doi.org/10.1038/s41588-019-0480-1

PsUniLowCopy_to_best3_Psat.tsv : Mapping of PsUniLowCopy to genes ("Psat") using DIAMOND. Three best hits were conserved. 
genopea_counts_on_Genome_raw.csv : raw count data on gene computed with Salmon. 
genopea_counts_on_Genome_TPM.csv : normalized count data on gene computed with Salmon. 

Apart for some specific case were  gene models aren't good enough, it's advised to use counts produced on Pisum sativum V1a genes and not the transcriptome.