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An evaluation of codes more compact than the natural genetic code
An evaluation of codes more compact than the natural genetic code

... One merit of this proposal from an evolutionary point the natural genetic code could be coded for by the first two of view is the decreased number of possible codes which positions instead of only so few. The justification to propose would result. Here is why this matters. Before a code could a prec ...
View PDF
View PDF

... encodes for a precise combination of amino acids at the protein level. ATGGATTGCGTG (DNA or gene) changes to AUGGAUUGCGUG (RNA, single gene product) to encode Methionine, Aspartate, Cysteine and Valine amino acid residue, building thereby a crucial motif for the protein function. The motif cannot be ...
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1. Amino Acids,Peptides, Proteins

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Genetics
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DNA_Project - Berkeley Cosmology Group
DNA_Project - Berkeley Cosmology Group

... from phosphate, a sugar, and one of four nitrogenous bases. The four nitrogenous bases are adenine, thymine, cytosine, and guanine. Based on this cytosine bonds with guanine, and thymine binds with guanine to form bonds between the nucleotides thus creating a strand of DNA. DNA is used in a cell to ...
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handout

... AUG start codon. 2. Next, the tRNA and small sub-unit complex bind to translation initiation factors and attach to the 5’ cap of the mature mRNA. 3. Next, the entire complex scans in the 3’ direction until it finds the AUG start codon of the mRNA 4. Lastly, the 60S large sub-unit binds to the comple ...
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... the sense that it is also a polymer made up of repeated nucleotides. However, it is single stranded. It is made up of also a different sugar. Its nucleotides are A, U, G, and C, where U is the analog of T in DNA. While most of the RNA gets translated into proteins there are some other types of RNA t ...
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... Learning goals •  1. Explain what a mutation is and how it can affect an organism. •  2. Name the two types of cells where mutations can occur and the affects. •  3. Describe the two types of gene mutations and give examples of each. ...
From Gene to Protein—Transcription and Translation
From Gene to Protein—Transcription and Translation

... In translation, each set of three nucleotides in an mRNA molecule codes for one amino acid in a protein. This explains why each set of three nucleotides in the mRNA is called a codon. Each codon specifies a particular amino acid. For example, the first codon shown above, CGU, instructs the ribosome ...
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462a Reading and Homework Assignment 3

... (4) Both cis and trans peptide bonds gain about 85 kJ/mol resonance energy when planar (through  orbital alignment). Why are cis peptide bonds rarely seen in proteins? Why are cis peptide bonds more common for prolines than for other amino acids? Steric clash limits cis peptide bonds in most amino ...
Lecture 3: Mutations
Lecture 3: Mutations

... amino acids are coded for by several alternative codons), the resulting new codon may still code for the same amino acid. 2. Missense Mutation: A missense mutation is a nucleotide substitution that changes a codon so that it codes for a different amino acid in the protein. This usually results in a ...
Cross-species Extrapolation of an Adverse Outcome Pathway for Ecdysteroid Receptor Activation
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... Sequence Alignment to Predict Across Species Susceptibility (SeqAPASS) ...
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6.2 Human Genetic Disorders

... • Down Syndrome – An extra copy of chromosome 21. Some degree of mental retardation.– Caused during meiosis: chromosomes fail to separate properly. ...
Review - hrsbstaff.ednet.ns.ca
Review - hrsbstaff.ednet.ns.ca

... chromosome is moved to a new location. 4. When a new nucleotide changes the codon to produce a terminator prematurely it is known as _________. 5. When a base pair is removed or a base pair is added, it is known as __________ and ___________ respectively. 6. ___________ is when a new nucleotide prod ...
No Slide Title
No Slide Title

... RNA nucleotides in the cell match up with only one side of the “unzipped” DNA each “unzipped’ strands forms a template for a mRNA strand ...
Slide 1
Slide 1

... 3.16 Nucleic acids are information-rich polymers of nucleotides  A nucleic acid polymer, a polynucleotide, forms from the nucleotide monomers when the phosphate of one nucleotide bonds to the sugar of the next nucleotide – The result is a repeating sugar-phosphate backbone with protruding nitrogen ...
Chapters 13-16, Molecular Genetics
Chapters 13-16, Molecular Genetics

... c. three base code (43) = a three base code will produce 64 possibilities, more than enough 2. codon = 3 bases found on mRNA a. 3 “stop” codons b. 1 “start” codon c. third base in the codon is often less specific than the first two d. several codons can code for the same amino acid (degenerate) 3. g ...
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Genetic code



The genetic code is the set of rules by which information encoded within genetic material (DNA or mRNA sequences) is translated into proteins by living cells. Biological decoding is accomplished by the ribosome, which links amino acids in an order specified by mRNA, using transfer RNA (tRNA) molecules to carry amino acids and to read the mRNA three nucleotides at a time. The genetic code is highly similar among all organisms and can be expressed in a simple table with 64 entries.The code defines how sequences of these nucleotide triplets, called codons, specify which amino acid will be added next during protein synthesis. With some exceptions, a three-nucleotide codon in a nucleic acid sequence specifies a single amino acid. Because the vast majority of genes are encoded with exactly the same code (see the RNA codon table), this particular code is often referred to as the canonical or standard genetic code, or simply the genetic code, though in fact some variant codes have evolved. For example, protein synthesis in human mitochondria relies on a genetic code that differs from the standard genetic code.While the genetic code determines the protein sequence for a given coding region, other genomic regions can influence when and where these proteins are produced.
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