“…B7 family members share same GPIâlinked transmembrane proteins comprised of IgV and IgC domains. Prominent ligands include B7âH1 (PDâL1, CD274; Dong, Zhu, Tamada, & Chen, 1999), B7âH2 (PDâL2, CD275, ICOSL; Wang et al, 2000), B7âH3 (CD276; Wu, Liu, & Ding, 2016), B7âH4 (B7âS1, B7x; Sica et al, 2003), B7âH5 (CD28H; Sedykh, Prinz, Buneva, & Nevinsky, 2018), B7âH6 (Godwin, Gale, & Walter, 2017), B 7 âDC (PDâL2, CD273; Huret et al., 2001), B7â1 (CD80; Greaves & Gribben, 2013), PDâ1H (VISTA; Flies, Wang, Xu, & Chen, 2011), B7â2 (CD86; Greaves & Gribben, 2013), and many others (Schildberg, Klein, Freeman, & Sharpe, 2016) as shown in Figure 2.…”