Synaptophysin (SYN), a component of endocytic vesicles, can bind the ligand combining single-chain antibody (scAb) C1-3 with tributyl tin to the SYN receptor (Douglass et al., 2008), specifically via endocytosis, for the treatment of nonalcoholic steatohepatic LF. This evidence concerns the gene SYP and Lassa fever.