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Expression of podocalyxin mRNA in developing pronephric glomerulus. podocalyxin mRNA is detected by in situ hybridization in the paired glomerular primordia at 24 and 34 hpf (arrowheads in A and B). Glomerular primordia fuse at the midline to form a glomerulus by 2 dpf, and podocalyxin expression continues in the glomerulus to 2 and 3 dpf (arrowheads in C and D). Asterisks indicate the notochord. Bar scale, 10 μm.
