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. Author manuscript; available in PMC: 2020 Jun 10.
Published in final edited form as: Lab Invest. 2020 Jan 2;100(6):874–886. doi: 10.1038/s41374-019-0366-y

Fig 3.

Fig 3

Placenta and tonsil FFPE sections incubated in the acceleration chamber under different environmental conditions at day 28; A-D: 100% oxygen and 80% humidity at either 20°C or 37°C, then stained for PD-L1 (E1L3N) or pan-CK (AE1/AE3): A – Placenta PD-L1, B – Tonsil PD-L1, C – Placenta pan-CK, D – Tonsil pan-CK. E-F: 100% oxygen and 37°C at either 45% or 80% humidity at day 28, E – Placenta PD-L1, F – Tonsil PD-L1.

Control conditions: 20°C, atmospheric humidity and oxygen. Bar represents mean ± SEM. *p<0.05, **p<0.01, ***p<0.001.

PD-L1, programmed-death-ligand-1; CK – cytokeratin; FFPE, formalin-fixed, paraffin embedded.