Summary
Comparing DNA or protein sequences to find similarity that suggests common function or ancestry, using BLAST.
In depth
Global (Needleman-Wunsch) and local (Smith-Waterman) alignment use scoring matrices (BLOSUM) and gap penalties. E-values show how likely a match is by chance. Conserved regions suggest functional importance.
Homology means shared ancestry, similarity is the observed likeness. High sequence identity suggests conserved function; low identity may still show structural similarity. Multiple alignments highlight conserved residues for drug design.
Example: BLAST finds a human gene's mouse homologue.
Frequently asked questions
What is Sequence Alignment?
Comparing DNA or protein sequences to find similarity that suggests common function or ancestry, using BLAST.
Which area of biology covers Sequence Alignment, and how advanced is it?
Sequence Alignment is one of the 56 topics in Biotechnology & Genomics. It is rated Intermediate, so it suits learners who already know the core vocabulary. Related topics in this area include Bioinformatics, Protein Structure Prediction, Comparative Genomics.
Can you give an example of Sequence Alignment?
Aligning SARS-CoV-2 variants highlights mutations.
What should I learn before Sequence Alignment?
Work through the Beginner topics in Biotechnology & Genomics first, such as Biotechnology, Genetic Engineering, Selective Breeding, then return to Sequence Alignment. Intermediate topics assume the Beginner vocabulary.
What topics are related to Sequence Alignment?
The closest topics to Sequence Alignment are Bioinformatics, Protein Structure Prediction, Comparative Genomics, Genomics. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Sequence Alignment?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Sequence Alignment. To practise the whole of Biotechnology & Genomics, use the Biotechnology & Genomics quiz.
How is Sequence Alignment different from Bioinformatics?
Sequence Alignment: Comparing DNA or protein sequences to find similarity that suggests common function or ancestry, using BLAST. Bioinformatics: Uses computing to store, analyse and interpret biological data like sequences and structures. Read both side by side and note what each one explains.
How should I study Sequence Alignment step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Bioinformatics and explain the difference aloud. Finally, take the Biotechnology & Genomics quiz and come back to this page for any question you miss.