Fig. 5From: Novel biomanufacturing platform for large-scale and high-quality human T cells productionQuality of the T cells in our novel biomanufacturing. a Diagram of T cell proliferation and differentiation pathway. b Both CD4+ and CD8+ T cells showed high 99% purity after the expansion. c Proliferation signal. PD-1 expression level was related to cell proliferation status. Note: The CCR7, CD45RA and CD45RO surface proteins were used to identify cell subsets [57]Back to article page