In addition, the support of SFV infection by individual LA repeat was assessed by ectopically expressing VLDLR truncation mutants, including VLDLR-Flag, LA1-Flag, LA2-Flag, LA3-Flag, and LA5-Flag (Fig 1F), in cell line K562 which is non-permissive for SFV. The gene discussed is VLDLR; the disease is infection.