For example, hypoxia‐associated transcription factor HIF1A and BBB transporter MFSD2A were found to be upregulated specifically in the vEC subset (Figure 2E), whereas INPP5D, a gene found upregulated in both AD and HD studies (Table S2A), was found to be altered specifically in cECs of the Yang et al. The gene discussed is MFSD2A; the disease is Huntington disease.