SLC38A7 and neoplasm: Of the 67/68Ga labelled complexes created, the 67Ga (half-life 3.24 d) analogues were tested in vitro against four tumour cell lines as well as uptake inhibition studies against l-glutamine, and the known amino acid transporter inhibitors, 2-aminobicyclo-(2,2,1)-heptane-2-carboxylic acid (BCH)–the Large Neutral Amino Acid Transport Inhibitor [26], and 2-(methylamino)isobutyric acid (MeAIB)–the system A Glutamine Transporter Inhibitor [27].