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Urea transporter 2

Mediates the transport of urea driven by a concentration gradient across the cell membrane of the renal inner medullary collecting duct which is critical to the urinary concentrating mechanism

Urea transporter 1

Mediates the transport of urea driven by a concentration gradient across the cell membrane of erythrocytes (PubMed:10514515, PubMed:7797558, PubMed:7989337, PubMed:8997401). … Also mediates the transport of urea across the cell membrane of the renal inner medullary collecting duct which is critical to the urinary concentrating mechanism (By similarity).

Interleukin-13

Stimulates B-cell proliferation, and activation of eosinophils, basophils, and mast cells (PubMed:7903680, PubMed:8759755). … Aside from IL13RA1, another receptor IL13RA2 acts as a high affinity decoy for IL13 and mediates internalization and depletion of extracellular IL13 (PubMed:21622864).

A disintegrin and metalloproteinase with thrombospondin motifs 13

Cleaves the vWF multimers in plasma into smaller forms thereby controlling vWF-mediated platelet thrombus formation

Kelch protein 13

Retinol dehydrogenase 13

Retinol dehydrogenase with a clear preference for NADP. Oxidizes all-trans-retinol, but seems to reduce all-trans-retinal with much higher efficiency (PubMed:18039331). Has no activity toward steroids (PubMed:18039331)

Troponin C, slow skeletal and cardiac muscles

Tn consists of three components: Tn-I which is the inhibitor of actomyosin ATPase, Tn-T which contains the binding site for tropomyosin and Tn-C. … The binding of calcium to Tn-C abolishes the inhibitory action of Tn on actin filaments

Carbonic anhydrase 13

Catalyzes the reversible conversion of carbon dioxide to hydrogencarbonate/bicarbonate and thus is essential in the regulation of pH and metabolic processes

Cytochrome c3, 13 kDa

Participates in sulfate respiration coupled with phosphorylation by transferring electrons from the enzyme dehydrogenase to ferredoxin.

C-C motif chemokine 5

Chemoattractant for blood monocytes, memory T-helper cells and eosinophils. Causes the release of histamine from basophils and activates eosinophils. … May also be an agonist of the G protein-coupled receptor GPR75, stimulating inositol trisphosphate production and calcium mobilization through its activation.