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Histones are proteins that protect DNA from restriction enzymes and also act as bolsters in chromosome condensation, (Ito, 2007). A “Histone Core”, made of nine types of histone proteins, is attached to DNA molecules whose length varies from 146bp to 148bp. In the histone core, a combination of modifications, within specific amino acids in each histone subtype leads to gene expression or inactivation, (Kouzarides, 2007). These modification patterns, unlike stable DNA methylation, are dynamic and activation of one change leads to successive modifications of other amino acids during cellular events, (Allis et al., 2007; Jung & Kim, 2009). Even though new findings with regard to the impact. | BIOENERGETICS Edited by Kevin Clark INTECHWEB.ORG Bioenergetics Edited by Kevin Clark Published by InTech Janeza Trdine 9 51000 Rijeka Croatia Copyright 2012 InTech All chapters are Open Access distributed under the Creative Commons Attribution 3.0 license which allows users to download copy and build upon published articles even for commercial purposes as long as the author and publisher are properly credited which ensures maximum dissemination and a wider impact of our publications. After this work has been published by InTech authors have the right to republish it in whole or part in any publication of which they are the author and to make other personal use of the work. Any republication referencing or personal use of the work must explicitly identify the original source. As for readers this license allows users to download copy and build upon published chapters even for commercial purposes as long as the author and publisher are properly credited which ensures maximum dissemination and a wider impact of our publications. Notice Statements and opinions expressed in the chapters are these of the individual contributors and not necessarily those of the editors or publisher. No responsibility is accepted for the accuracy of information contained in the published chapters. The publisher assumes no responsibility for any damage or injury to persons or property arising out of the use of any materials instructions methods or ideas contained in the book. Publishing Process Manager Maja Jukic Technical Editor Teodora Smiljanic Cover Designer InTech Design Team First published February 2012 Printed in Croatia A free online edition of this book is available at www.intechopen.com Additional hard copies can be obtained from orders@intechweb.org Bioenergetics Edited by Kevin Clark p. cm. ISBN 978-953-51-0090-4 INTECH open science I open minds free online editions of InTech Books and Journals can be found at .
