Brain specific sodium (and chloride)-dependent proline transporter (PubMed:10414958). Terminates the action of proline by its high affinity sodium-dependent reuptake into presynaptic terminals (Probable). chloride(out) + L-proline(out) + 2 Na(+)(out) = chloride(in) + L-proline(in) + 2 Na(+)(in) chloride(out) + L-pipecolate(out) + 2 Na(+)(out) = chloride(in) + L-pipecolate(in) + 2 Na(+)(in) Expressed in subpopulations of putative glutamatergic pathways of rat brain. Belongs to the sodium:neurotransmitter symporter (SNF) (TC 2.A.22) family. SLC6A7 subfamily.