Genetic Code

The sequence of amino acids for all proteins of a living organism are encoded in genes in DNA as the genetic code. DNA base sequence stored the genetic code. DNA bases are A for adenine, T for thymine, C for cytosine, and G for guanine.

Messenger RNA carry a DNA gene code from the nucleus to the cytoplasm in a sequence of codons for proteins creation. Messenger RNA bases are A for adenine, U for uracil, C for cytosine, and G for guanine. A codon is a combination of three messenger RNA bases. There are 64 codons. Sixty-one codons are code for one of the twenty amino acids. Some amino acids have more than one codon. Three codons are stops of amino acid sequence. The stops codons are UAA, UAG, and UGA. The AUG is codon code for amino acid methioninee and for the start of a amino acid sequence.

Transfer RNA bring the correct amino acid to the messager RNA. Transfer RNA have an anticodon. Since there are 61 codon for amino acids, there are 61 anticodon and 61 types of transfer RNA.

The genetic code - 64 codons for amino acids
U U C A G .
UUU phenylalanine UCU serine UAU tyrosine UGU cysteine U
UUC phenylalanine UCC serine UAC tyrosine UGC cysteine C
UUA leucine UCA serine UAA stop UGA stop A
UUG leucine UCG serine UAG stop UGG tryptophan G
C CUU leucine CCU proline CAU histidine CGU arginine U
CUC leucine CCC proline CAC histidine CGC arginine C
CUA leucine CCA proline CAA glutamine CGA arginine A
CUG leucine CCG proline CAG glutamine CGG arginine G
A AUU isoleucine ACU threonine AAU asparagine AGU serine U
AUC isoleucine ACC threonine AAC asparagine AGC serine C
AUA isoleucine ACA threonine AAA lysine AGA arginine A
AUG methionine (start) ACG threonine AAG lysine AGG arginine G
G GUU valine GCU alanine GAU asparagine GGU glycine U
GUC valine GCC alanine GAC asparagine GGC glycine C
GUA valine GCA alanine GAA asparagine GGA glycine A
GUG valine GCG alanine GAG asparagine GGG glycine G

The genetic code - 64 codons for amino acids
U	U	C	A	G	.
UUU phenylalanine	UCU serine	UAU tyrosine	UGU cysteine	U
UUC phenylalanine	UCC serine	UAC tyrosine	UGC cysteine	C
UUA leucine	UCA serine	UAA stop	UGA stop	A
UUG leucine	UCG serine	UAG stop	UGG tryptophan	G
C	CUU leucine	CCU proline	CAU histidine	CGU arginine	U
CUC leucine	CCC proline	CAC histidine	CGC arginine	C
CUA leucine	CCA proline	CAA glutamine	CGA arginine	A
CUG leucine	CCG proline	CAG glutamine	CGG arginine	G
A	AUU isoleucine	ACU threonine	AAU asparagine	AGU serine	U
AUC isoleucine	ACC threonine	AAC asparagine	AGC serine	C
AUA isoleucine	ACA threonine	AAA lysine	AGA arginine	A
AUG methionine (start)	ACG threonine	AAG lysine	AGG arginine	G
G	GUU valine	GCU alanine	GAU asparagine	GGU glycine	U
GUC valine	GCC alanine	GAC asparagine	GGC glycine	C
GUA valine	GCA alanine	GAA asparagine	GGA glycine	A
GUG valine	GCG alanine	GAG asparagine	GGG glycine	G

Andromeda Logs: Genetics

(c) 2001: Burton Craddock