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Lab 6 Pseudocode

The document outlines a series of functions for analyzing DNA sequences, including counting nucleotides, calculating mass percentages, and identifying codons. It specifies criteria for determining if a sequence is a protein and details how to read from a file and output results. The main function orchestrates the process by reading the file, processing sequences, and writing the results to an output file.

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paul Martin
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9 views2 pages

Lab 6 Pseudocode

The document outlines a series of functions for analyzing DNA sequences, including counting nucleotides, calculating mass percentages, and identifying codons. It specifies criteria for determining if a sequence is a protein and details how to read from a file and output results. The main function orchestrates the process by reading the file, processing sequences, and writing the results to an output file.

Uploaded by

paul Martin
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Set up mass values for each letter

List stop codons

read_dna_file:
​ - ask for file name
​ - read lines into a list

count_nucleotides:
​ - count A, C, G, T in the sequence
​ - return counts

calculate_mass_percentage:
​ - get total mass
​ - get A, C, G, T mass
​ - calculate percent for each
​ - return total mass + percents

get_codons:
​ - remove "-"
​ - break into sets of 3
​ - return list of codons

is_protein:
​ - must have 5+ codons
​ - must start with ATG
​ - must end with stop codon
​ - C+G percent must be 30+
​ - return True/False

analyze_sequences:
​ - even lines = names
​ - odd lines = sequences
​ - return both

output_results:
​ - write name, sequence, counts
​ - write percents and mass
​ - write codons
​ - write if protein or not

main:
​ - read file
​ - split into names/sequences
​ - get output file name
​ - for each sequence:
​ - run all checks
​ - write results

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