In contrast, the lung adenocarcinoma tissue sections showed positive staining for KrasG12D, and the KrasG12D-stained samples showed high BLT2 expression in the KrasG12D-positive region, consistent with the suggested role of elevated BLT2 expression in KRAS-driven lung cancer (Fig. 5b, c). The gene discussed is LTB4R2; the disease is lung carcinoma.