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codon    
密码子; 码字

密码子; 码字

codon
n 1: a specific sequence of three adjacent nucleotides on a
strand of DNA or RNA that specifies the genetic code
information for synthesizing a particular amino acid

Codon \Co"don\ (k[=o]"d[o^]n), n. (Molecular biology)
a sequence of three nucleotides in a genome or a DNA or
messenger RNA molecule, which specifies the incorporation of
one amino acid or is a stop signal, during the biosynthesis
of proteins. Codons occur within the protein-coding segments
of the DNA or RNA genome of living organisms. The amino acid
sequence of proteins synthesized on ribosomes is thus
determined by the sequence of the nucleotides in the genome.
[PJC]

Note: Outside of coding regions, there is no direct
correspondence of the nucleotide sequence with protein
sequence, and certain signalling functions of nucleic
acids are not specified by three-nucleotide codons.
Certain types of polypeptide synthesized in living
organisms are not synthesized on ribosomes, and the
sequences of these polypeptides do not have a
corresponding nucleotide sequence in the genome.
[PJC]


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  • Codon | Definition, Function, Examples | Britannica
    codon, in genetics, any of 64 different sequences of three adjacent nucleotides in DNA that either encodes information for the production of a specific amino acid or serves as a stop signal to terminate translation (protein synthesis)
  • Codon - National Human Genome Research Institute
    A codon is a DNA or RNA sequence of three nucleotides (a trinucleotide) that forms a unit of genomic information encoding a particular amino acid or signaling the termination of protein synthesis (stop signals)
  • Genetic code - Wikipedia
    Genetic code is a set of rules used by living cells to translate information encoded within genetic material (DNA or RNA sequences of nucleotide triplets or codons) into proteins
  • Codon Chart: Table, Amino Acids RNA Wheel Explained
    Explore the codon chart, tables, amino acids, and RNA wheel Learn how to read and interpret codons for protein synthesis and genetic coding
  • Codon Learning
    Codon Learning is a science courseware developer that supports the practice of evidence-based teaching Our student-centered approach applies active engagement, assessment, inclusivity, and analytics to improve learning outcomes
  • Codon Chart - Codon Table, mRNA Codon Chart, Amino Acids RNA Wheel . . .
    What is a Codon Chart? A codon chart is described as a key that translates three-nucleotide groups into amino acids, and it is presented usually as a table or circle A codon is formed by three bases (triplet), and it is represented on the chart as combinations like AUG, GCU, UGA, etc
  • codon | Learn Science at Scitable - Nature
    A codon is a sequence of three DNA or RNA nucleotides that corresponds with a specific amino acid or stop signal during protein synthesis DNA and RNA molecules are written in a language of four
  • Codon - Definition and Examples - Biology Online Dictionary
    Because the collection of codons on mRNA forms the genetic code, a codon is the smallest unit of genetic code In simple terms, each codon actually encrypts a specific amino acid It may also code for a signal to stop or start the process of protein synthesis in a cell See Figure 1
  • Codons | Biology for Majors I - Lumen Learning
    These nucleotide triplets are called codons The insertion of one or two nucleotides completely changed the triplet reading frame, thereby altering the message for every subsequent amino acid (Figure 1)





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