ABCG1 and hyperinsulinemic hypoglycemia, familial, 4: These peaks consisted of single nucleotide polymorphisms (SNPs) at the NRT1.1, AGAMOUS-LIKE 65 (AGL65, AT1G18750), ATP-BINDING CASSETTE G1 (ABCG1, AT2G39350), or INOSITOL 1,3,4-TRISPHOSPHATE 5/6-KINASE 3 (ITPK3, AT4G08170) locus, implicating a possible association of these genes with the natural variation in N deficiency responses.