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Human single cell lung gene expression normalized to transcripts per million (TPM) from LunGENS web portal (Du et al., 2015). Single cell lung gene expression patterns from the Dropseq PND1 experiment for angiotensin-converting enzyme 2 (ACE2: black), transmembrane protease, serine 2 (TMPRSS2; orange), and histamine receptors H1 (blue), H2 (green), and H4 (yellow).
