Codon Usage Calculator
Analyze codon usage patterns, frequency, and relative synonymous codon usage (RSCU) in coding sequences.
Sequence Input
DNA sequences (T) will be automatically converted to RNA (U)
RSCU (Relative Synonymous Codon Usage)
RSCU = 1.0 means the codon is used at expected frequency. Greater than 1.0 indicates preferential usage, less than 1.0 indicates underuse.
Sequence Summary
12 codons
11 unique codons used
GC Content by Position
1st Position (GC1)41.7%
2nd Position (GC2)25.0%
3rd Position (GC3)83.3%
Total GC Content50.0%
Codon Usage Table
| Codon | AA | Count | Freq% | RSCU |
|---|---|---|---|---|
| AUG | M (Met) | 2 | 16.7% | 1.00 |
| GCC | A (Ala) | 1 | 8.3% | 4.00 |
| AAG | K (Lys) | 1 | 8.3% | 1.00 |
| CUG | L (Leu) | 1 | 8.3% | 6.00 |
| UAC | Y (Tyr) | 1 | 8.3% | 2.00 |
| GAG | E (Glu) | 1 | 8.3% | 2.00 |
| AAA | K (Lys) | 1 | 8.3% | 1.00 |
| UUU | F (Phe) | 1 | 8.3% | 2.00 |
| GGG | G (Gly) | 1 | 8.3% | 4.00 |
| UAG | * (Stop) | 1 | 8.3% | 3.00 |
| CCC | P (Pro) | 1 | 8.3% | 4.00 |