Genes IX by Benjamin Lewin
By Benjamin Lewin
From popular writer Benjamin Lewin comes the most recent variation of his vintage textual content, Genes IX. for many years Lewin has supplied the educating neighborhood with the main leading edge presentation of molecular biology and molecular genetics, protecting gene constitution, sequencing, association, and expression. the recent 9th version boasts a clean smooth layout and modern paintings application, in addition to a brand new association which permits scholars to concentration extra sharply on person issues. completely up-to-date all through, together with a brand new bankruptcy on Epigenetic results, Genes IX proves to be the most up-tp-date, entire and student-friendly molecular biology textual content to be had!
Read or Download Genes IX PDF
Similar genetics books
John Avise offers a evaluate of latest molecular biology that is rather available to the 'lay' reader with a few earlier publicity to the final zone of evolutionary-genetics. The discussions are just a little philosophically charged (i. e. they don't stay unavoidably technical) and comment on social, emotional, and theological matters too.
The new literature on complete genome sequences presents considerable facts for the motion of traditional genetic engineering in evolution. Discoveries approximately ordinary genetic engineering have coincided with quick development in our knowing of epigenetic regulate and RNA-directed chromatin formation. unique recognition should be paid to the position of viruses and comparable so-called "parasitic" parts within the starting place of genome formatting and common genetic engineering functions specially the function of non-random genetic switch operators within the creation of complicated evolutionary innovations.
"Wright's perspectives approximately inhabitants genetics and evolution are so primary and so finished that each critical scholar needs to study those books firsthand. . . . booklet of this treatise is an immense occasion in evolutionary biology. "-Daniel L. Hartl, BioScience
- The Human Genome Project: Cracking the Genetic Code of Life
- The Britannica Guide to Genetics
- Philosophy of Behavioral Biology (Boston Studies in the Philosophy of Science, Vol. 282)
- Am I My Genes?: Confronting Fate and Family Secrets in the Age of Genetic Testing
- The Ancestor's Tale: A Pilgrimage to the Dawn of Life
Additional resources for Genes IX
Each metabolic step is catalyzed by a par ticular enzyme, whose production is the responsibility of a single gene. A mutation in the gene alters the activity of the protein for which it is responsible. A modification in the hypothesis is needed to accommodate proteins that consist of more than one subunit. If the subunits are all the same, the protein is a homomultimer, repre sented by a single gene. If the subunits are dif ferent, the protein is a heteromultimer. Stated as a more general rule applicable to any het eromultimeric protein, the one gene : one enzyme hypothesis becomes more precisely expressed as one gene: one polypeptide chain.
Different isolates of a particular viroid strain vary from one another, and the change may affect the phenotype of infected cells. For exam pIe, the mild and severe strains of PSTV differ by three nucleotide substitutions. Viroids resemble viruses in having herita ble nucleic acid genomes. They fulfill the crite ria for genetic information. Yet viroids, which are sometimes called subviral pathogens, dif fer from viruses in both structure and function. Viroid RNA does not appear to be translated into protein, so it cannot itself code for the func tions needed for its survival.
CHAPTER 2 Genes Code for Proteins A Gene Codes for a SingLe PoLypeptide • The one gene: one enzyme hypothesis summarizes the basis of modern genetics: that a gene is a stretch of DNA coding for a single polypeptide chain. t~:r 24 III Key concepts Each gene is part of a continuous Start of gene gene are the different forms that are found at its locus. The key to understanding the organization of genes into chromosomes was the discovery of genetic linkage-the tendency for genes on the same chromosome to remain together in the progeny instead of assorting independently as predicted by Mendel's laws.