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Renal Ca2+ handling along the tubules
S2, segment 2; S3, segment 3; FGF23, fibroblast growth factor 23; CaSR, calcium sensing receptor; DCT, distal convoluted tubule; CNT, connecting tubule; TRPV, transient receptor potential vallinoid; NCX1, Na2+/Ca2+ exchanger; PMCA1b, plasma membrane Ca2+-ATPase.
