Acts as a heparin receptor in vascular cells (By similarity). May be involved in vesicle transport in exocrine cells and Sertoli cells (By similarity). {ECO:0000250|UniProtKB:Q3UFJ6, ECO:0000250|UniProtKB:Q4QQS1}. This is the function of Ensembl gene identifier ENSG00000164855 (TMEM184A, transmembrane protein 184A).