title: Python finding the longest ORF
body: <p>Can someone show me a straightforward solution for how to calculate the longest open reading frame (ORF) > 30bp in length in a DNA sequence? ATG is the start codon (i.e., the beginning of an ORF) and TAG, TGA, and TAA are stop codons (i.e., the end of an ORF). Without the use of BioPython. </p>