Research overview: FeLV receptor biology and cell entry

FeLV subgroups enter cells using different host membrane receptors, and identifying these receptors clarified why the subgroups cause different diseases. Subgroup A uses a thiamine transporter, subgroup B exploits phosphate transporters, and subgroup C uses a heme exporter whose disruption produces severe anemia. Mapping receptor usage explained tissue tropism and the pathology of each subgroup at a molecular level. This overview synthesizes receptor-biology studies rather than one citation, describing how recombination shifts receptor preference as infection evolves within a cat, why blocking specific transporters causes characteristic syndromes such as pure red cell aplasia, and how this molecular understanding informs both feline retrovirology and the comparative study of gammaretrovirus entry mechanisms.