Fig. 5

Binding of CD80 and CD86 with each CD28 splicing isoform product. a–c HeLa cells with transiently overexpressed GFP-conjugated CD28 and CD28i were incubated in the presence of His-tag conjugated CD86-Fc and PE-conjugated anti-His-Tag antibody. Dot plot for mock (a), CD28 (b), and CD28i (c). The horizontal and vertical axes indicate the expression of GFP-tagged CD28 isoforms and the bindings of His-tagged CD86-Fc, respectively. d, e In silico prediction of binding between CD80 and CD28 splicing isoforms. Although binding between CD80 and CD28 was predicted (d), that between CD80 and CD28i was not (e)