Gene Expression Terminologycontinued
Molecular Diagnostics
(MDx) Review 539
TERM EXPLANATION
Codon
Start codon
Termination codons
Anticodon
Ribosomes
3 nucleotides that code for an amino acid, e.g., GCC codes for alanine. 64 codons code for 21 amino acids.
2–6 codons for each, except methionine & tryptophan which only have 1.AUG, codes for methionine.UAA, UAG, UGA. Not associated with any amino acid. Signal to stop protein synthesis.3-nucleotide sequence on tRNA that attaches to codon on mRNA, bringing with it specified amino acids.Organelles in cytoplasm & on surface of rough endoplasmic reticulum. Made of rRNA & protein. Site of
protein synthesis.