SLC6A17 and hereditary pheochromocytoma-paraganglioma: A later study using pheochromocytoma (PC)12 cells and SLC6A17-tranfected Chinese hamster ovary (CHO) cells found that SLC6A17 could transport four amino acids (AA): proline (Pro), glycine (Gly), leucine (Leu), and alanine (Ala) (Parra et al., 2008).