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Thanks for your interest in BioLegend products. To answer your question, PerCP anti-human CD45 Antibody (clone: HI30, Cat# 304026) helps discriminate cells of hematopoietic origin by identifying the antigen leukocyte common antigen.
The markers CD45RA and CD45RO are markers used for naïve/memory T cell analysis. I hope it helps and please let me know if you have any further questions.
I wish to add to my previous response by saying that clone HI30 recognize all isoforms of CD45 including CD45RO/RA. However as said earlier CD45RO/RA antibodies will specifically stain a subset of T cells depending upon their memory status and pan hematopoietic antibody CD45 (clone HI30) will stain all hematopoietic cells.