We have identified two L‐serine transporters (SLC1A4 and SLC7A10) with reduced mRNA levels in islet from individuals with newly diagnosed type 1 diabetes, while polymorphisms in the promoter of L‐serine transporter SLC1A5 (odds ratio 1.16) are genetically linked to the risk of developing of type 1 diabetes 25. The gene discussed is SLC1A4; the disease is type 1 diabetes mellitus.