In adult ventricular myocytes, the slow delayed rectifier (I Ks ) channels are distributed on the surface sarcolemma, not t-tubules.r In adult ventricular myocytes, KCNQ1 and KCNE1 have distinct cell surface and cytoplasmic pools.r KCNQ1 and KCNE1 traffic from the endoplasmic reticulum to the plasma membrane by separate routes, and assemble into I Ks channels on the cell surface.r Liquid chromatography/tandem mass spectrometry applied to affinity-purified KCNQ1 and KCNE1 interacting proteins reveals novel interactors involved in protein trafficking and assembly.r Microtubule plus-end binding protein 1 (EB1) binds KCNQ1 preferentially in its dimer form, and promotes KCNQ1 to reach the cell surface.r An LQT1-associated mutation, Y111C, reduces KCNQ1 binding to EB1 dimer.
Left maxillary permanent first molar showed minimum mean difference of measurements on study cast and introrally than right, thus better predictor for gender dimorphism in forensics.
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