Fig. 1.

Fluorescent-dextran labeling of gastric blood vessels. The gastric epithelium of anesthetized mice was surgically exposed, and Alexa-647-dextran (10 kDa, 4 mg/kg) (A) or fluorescein-dextran (70 kDa, 4 mg/kg) (B) was injected via tail vein. Top images in each set are confocal reflectance, and bottom images are respective fluorescence images, focusing into tissue 16 or 28 μm as indicated, ∼15 min after dextran injection. Representative images from 4 experiments are shown. Scale bar = 50 μm.