Gene finding

Recall that in prokaryotic genomes, the sequence coding for a protein
occurs as one contiguous open reading frame, and that an open reading
frame begins with the start codon ATG (methionine) in most species and
ends with a stop codon TAA, TAG, or TGA.

For example, the DNA sequence of Bacteriophage ϕ-X174, which was the
first genome to be sequenced, has 117 open reading frames (11 of which
are protein coding genes) within a circular single strand of 5,386
nucleotides.

Write code for the gene finding problem. The program must implement and
use the GENE-FINDING function in the pseudocode discussed in class,
which is iterative and is not allowed to perform input/output
operations. Make one submission with Python code and another submission
with C++ code.

Input

The input is a string s over the alphabet Σ = {A, C, G, T}.

Output

The output is a minimal substring of s (an open reading frame) from a
start codon to a stop codon.

Problem information

Author: Gabriel Valiente

Generation: 2026-01-25T17:35:24.985Z

© Jutge.org, 2006–2026.
https://jutge.org
