Bicarbonate is essential for protein tyrosine phosphatase 1B (PTP1B) oxidation and cellular signaling through EGF-triggered phosphorylation cascades — PTP1B oxidation and signaling by EGF requires bicarbonate — Bicarbonate is essential for protein-tyrosine phosphatase 1B (PTP1B) oxidation and cellular signaling through EGF-triggered phosphorylation cascades — EDITORS' PICK: Bicarbonate in PTP1B oxidation/signaling by EGF