passages.id: split_4_test_2276_passage
passages.type: progene_text
passages.text: For this analysis , we tested the sensitivity of SVZa progenitor cells to gamma - amino - n - butyric acid ( GABA ) , adenosine triphosphate ( ATP ) , kainate , N-methyl-D - aspartate ( NMDA ) , and acetylcholine ( ACh ) after 1 day in vitro .