Module 8
Validating sequences
Checking that a sequence contains only valid bases.
Is this a valid sequence?
A valid DNA sequence contains only A, T, G, and C. You can check this by verifying that the length equals the count of valid bases.
Python
seq = "ATGCGTA"
valid = seq.count("A") + seq.count("T") + seq.count("G") + seq.count("C")
print(valid == len(seq))→ True
Your task
Validate a sequence
- Check if ATGCGTA contains only valid bases.
Biology connection
Validating sequences is one of the first steps in any bioinformatics analysis. Garbage in, garbage out.