What are the features for Human Hepatic Sinusoidal Endothelial Cells?

What are the features for Human Hepatic Sinusoidal Endothelial Cells?
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HHSEC are isolated from human liver. HHSEC are cryopreserved immediately after purification and delivered frozen. Each vial contains >5 x 10^5 cells in 1 ml volume. HHSEC are characterized by immunofluorescent method with antibodies to vWF/Factor VIII and CD31 (P-CAM). HHSEC are negative for HIV-1, HBV, HCV, mycoplasma, bacteria, yeast and fungi.
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