MBB 222 Study Guide - Final Guide: Cooperative Binding, Hemoglobin, Red Blood Cell

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Mbb222 exam vocab definitions: structural switching and cooperative oxygen. Erythrocytes are red blood cells that bind and transport nearly all oxygen in animals. In humans they are small biconcave disks and are incomplete, vestigial cells that are unable to reproduce. U9-02 must hemoglobin subunits: alpha chain vs. beta chain. Hemoglobin is roughly spherical and is a tetrameric protein containing 4 heme prosthetic groups with 2 alpha chains and 2 beta chains. The 3d structure of each type of subunit are very similar to each other and also to myoglobin. This is the interface between 2 subunits. In hemoglobin the quaternary structure features strong interactions between unlike subunits including the: U9-02 load alpha-beta dimer (11 or 22) U9-02 load dimer interface (1 - 2 or 2 - 1) Mild treatment of hemoglobin with urea tends to disassemble the tetramer into alpha-beta dimers, however these dimers remain intact. U9-02 first r (relaxed) state vs. t (tense) state.

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