Mol.Bio.PartIV - Molecular Biology Part IV Cell...

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Molecular Biology Part IV
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Cell Information: Instruction book of Life DNA, RNA, and Proteins are examples of strings written in either the four-letter nucleotide of DNA and RNA (A C G T/U) or the twenty-letter amino acid of proteins. Each amino acid is coded by 3 nucleotides called codon. (Leu, Arg, Met, etc.)
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UUU UUC UUA UUG CUU CUC CUA CUG AUU AUC AUA AUG GUU GUC GUA GUG UCU UCC UCA UCG CCU CCC CCA CCG ACU ACC ACA ACG GCU GCC GCA GCG UAU UAC UAA UAG CAU CAC CAA CAG AAU AAC AAA AAG GAU GAC GAA GAG UGU UGC UGA CGU CGC CGA CGG AGU AGC AGA AGG GGU GGC GGA GGG UGG phe leu ile met val ser pro thr ala tyr stop his gin asn lys asp glu cys stop arg ser arg gly trp The Genetic Code
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The genetic code
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Code Features All possible 64 triplets have a meaning. The codes are not unique for a particular amino acid except for met (AUG) and trp (UGG) . If an amino acid has multiple codes, its first two letters are the same. The codes UAA, UAG and UGA denote ‘ stop ’ and do not represent any protein. The code AUG appears at the beginning of every protein and it is therefore recognized as an initiation code but also has the significance that all proteins are synthesized with a methionine at the beginning (but later may be discarded within the cell). Methionine may not be always an initiation code and may also appear in the middle of a protein. The genetic code is not universal in the sense that it applies only to nuclear genes. The
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This note was uploaded on 06/12/2011 for the course CAP 5510 taught by Professor Staff during the Spring '08 term at University of Central Florida.

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Mol.Bio.PartIV - Molecular Biology Part IV Cell...

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