REGARDING IDENTITY OF RESIDUE ARG 32, UPON QUESTIONING OF TOMMY CARSTENSEN, AUTHORS SONIA LONGHI ...REGARDING IDENTITY OF RESIDUE ARG 32, UPON QUESTIONING OF TOMMY CARSTENSEN, AUTHORS SONIA LONGHI STATED THE FOLLOWING IN 2009: BASED ON THE AA SEQUENCE, AN ARG IS INDEED SUPPOSED TO OCCUR AT THAT POSITION (SEE BELOW). I DO NOT REMEMBER WHY WE DECIDED TO ASSIGN THE ARG NAME TO THIS RESIDUE IN THE HIGH-RESOLUTION STRUCTURE (GIVEN THAT NO DENSITY COULD BE OBSERVED FOR THE SIDE CHAIN BEYOND THE CB). MOREOVER, IF THERE IS NO ROOM FOR THE ACCOMODATION OF AN ARG SIDE CHAIN, IT IS WELL POSSIBLE THAT AN ALA DOES REALLY OCCUR AND THAT THE ARG COMES FROM A SEQUENCING MISTAKE (OR A SUBSTITUTION DURING THE CLONING PROCEDURE IN THE PLASMID(S) USED FOR RECOMBINANT EXPRESSION). I DO NOT KNOW WHETHER AN ANALYSIS OF THE AA COMPOSITION WAS EVER PERFORMED ON THE RECOMBINANT PROTEIN USED FOR CRYSTALLOGRAPHY. WHEN I ARRIVED IN THE LAB, THE PROTEIN WAS ALREADY AVAILABLE
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実験情報
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実験
実験
手法: X線回折 / 使用した結晶の数: 2
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試料調製
結晶
マシュー密度: 1.98 Å3/Da / 溶媒含有率: 38 %
結晶化
pH: 7 詳細: PROTEIN WAS CRYSTALLIZED FROM 15 - 20% PEG 6000, 0.1 M HEPES, PH 7.0