This entry includes a group of animal riboflavin transporters, including SLC52A1, SLC52A2 and SLC52A3 from humans. They are plasma membrane proteins that transport vitamin B2 (riboflavin, RF) into cells []. In case of infection by retroviruses, they act as cell receptors to retroviral envelopes similar to the porcine endogenous retrovirus (PERV-A) [].
