BRAINCAKEComparing Amino-acids Sequences
The similarity of amino-acid sequences in some proteins will reflect how closely two species are related.
Comparisons can be done by counting the number of similarities or by counting the number of differences.
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Key terms in this lesson
- antigen
- A protein or glycoprotein, usually on a cell surface, that is recognised as foreign by the immune system and triggers an immune response.
- haemoglobin
- A globular, quaternary protein in red blood cells, made of four polypeptide chains each with a haem group, that binds and transports oxygen.
- species
- A group of organisms with similar characteristics that can interbreed to produce fertile offspring.
More in Biodiversity
- Managing Ecosystems
- Investigating Diversity
- Comparing DNA
- Comparing mRNA
- Sampling
- Random Sampling
- Normal Distribution
- Mean, median and Mode
All 33 lessons in Biodiversity · All AQA AS-level Biology topics