Tags: dna
Rating: 5.0
# Cod on
This challenge uses the Codons. A codon is a sequence of 3 letters, A, U, C or G.
In genetics, there are two types of massages: DNA and RNA. We can see that it is RNA by the presence of uracil (U)
We can translate to nitrogenous bases using this table :
![](https://ka-perseus-images.s3.amazonaws.com/f5de6355003ee322782b26404ef0733a1d1a61b0.png)
We also need the entire name of the nitrogenous bases :
Ala: Alanine Arg: Arginine Asn: Asparagine Asp: Aspartic acid
Cys: Cysteine Glu: Glutamic acid Gln: Glutamine Gly: Glycine
His: Histidine Ile: Isoleucine Leu: Leucine Lys: Lysine
Met: Methionine Phe: Phenylalanine Pro: Proline Ser: Serine
Thr: Threonine Trp: Tryptophan Tyr: Tyrosine Val: Valine
After translation, it give us :
```
AUG -> Methionine
CAA -> Glutamine
GGU -> Glycine
CUC -> Leucine
UUG -> Leucine
ACC -> Threonine
CAG -> Glutamine
UGG -> Tryptophan
AUA -> Isoleucine
CUA -> Leucine
AAU -> Asparagine
GCC -> Alanine
UGG -> Tryptophan
AAG -> Lysine
GUA -> Valine
GCA -> Alanine
UAC -> Tyrosine
UAG -> END
```
The first codon, the Methionine, is a "start" codon, it's always at the beginning of a RNA portion.
now, lets apply the key `Key: 6, 3, 4, 3, 1, 9, 8, 3, 3, 2, 7, 4, 1, 2, 4, 1`, ingnoring the first and the last codon, "start" and "stop", and take the X letter of the name of the nitrogenous bases :
```
AUG -> Methionine -> START
CAA6 -> Glutamine -> M
GGU3 -> Glycine -> Y
CUC4 -> Leucine -> C
UUG3 -> Leucine -> U
ACC1 -> Threonine -> T
CAG9 -> Glutamine -> E
UGG8 -> Tryptophan -> H
AUA3 -> Isoleucine -> O
CUA3 -> Leucine -> U
AAU2 -> Asparagine -> S
GCC7 -> Alanine -> E
UGG4 -> Tryptophan -> P
AAG1 -> Lysine -> L
GUA2 -> Valine -> A
GCA4 -> Alanine -> N
UAC1 -> Tyrosine -> T
UAG -> END -> END
```
It gives us the following flag : `rtcp{my_cute_houseplant}`
PS : Yes, Daphne, you were a cute houseplant
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*If you have any questions, you can dm me on Discord, nhy47paulo#3590*