StemExpress provides leading biomedical researchers around the world human hematological samples at life-changing speed. Our nationwide procurement network and state-of-the-art collection centers ensure StemExpress can reliably obtain the highest quality and most varied source material, including Leukopaks, peripheral and maternal blood, and bone marrow. Isolated cell lines are purified less than 24 hours from procurement, guaranteeing the purity, viability, and quality you need.