Other examples include anti-CD19 scFv-targeting B cells [70], RGD peptides (short sequences of amino acids [arginine–glycine–aspartate] that play a crucial role in cell adhesion and signaling by interacting with integrin receptors) targeting tumor blood vessels [71], and CXCR4-targeting peptides for liver cancer [72]. The gene discussed is CD19; the disease is neoplasm.