Related Experiment Video

Updated: Oct 29, 2025

Manipulation of Gene Function in Mexican Cavefish
07:01

Manipulation of Gene Function in Mexican Cavefish

Published on: April 22, 2019

9.4K

Evolution of hemoglobin function in tropical air-breathing catfishes

Niels Christian Moth Andersen1, Angela Fago1, Christian Damsgaard1,2

  • 1Section for Zoophysiology, Department of Biology, Aarhus University, Aarhus C, Denmark.

Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology
|July 13, 2021
PubMed

Keywords:
Bohr effectfishgas-exchangeoxygen affinity

More Related Videos

Genome Editing in Astyanax mexicanus Using Transcription Activator-like Effector Nucleases TALENs07:42

Genome Editing in Astyanax mexicanus Using Transcription Activator-like Effector Nucleases TALENs

Published on: June 20, 2016

8.5K
Incremental Temperature Changes for Maximal Breeding and Spawning in Astyanax mexicanus06:36

Incremental Temperature Changes for Maximal Breeding and Spawning in Astyanax mexicanus

Published on: February 14, 2021

4.2K

Related Concept Videos

Gene Duplication and Divergence02:37

Gene Duplication and Divergence

The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was  generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
7.3K
Convergent Evolution01:54

Convergent Evolution

Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
29.9K
Hemoglobin01:24

Hemoglobin

Hemoglobin is a globular protein made up of four subunits. Two of these subunits are alpha chains, and the other two are beta chains. Each subunit contains a molecule of heme, which has an iron atom and can bind to oxygen. When an oxygen molecule binds to one heme group, it changes the shape of hemoglobin, making it easier for the other heme groups to bind oxygen as well.
When all four heme groups are bound to oxygen, the resulting molecule is called oxyhemoglobin. As a result, arterial blood...
5.9K
Gene Families01:57

Gene Families

Gene families consist of groups of genes proposed to have originated from a common ancestor. Typically these arise through events in which a gene or genes are mistakenly duplicated during cell division. Unlike their parent genes (which are subject to selection pressure to maintain function), these gene copies do not need to preserve their sequences and may evolve at a relatively faster rate.
Occasionally these regions can be adapted to take on new roles within the organism, becoming novel genes...
9.4K
Oxygen Transport in the Blood01:27

Oxygen Transport in the Blood

Hemoglobin (Hb) is a crucial molecule in the human body, consisting of four polypeptide chains, each bound to an iron-containing heme group. This unique structure enables hemoglobin to bind to oxygen, with each molecule capable of combining with four molecules of oxygen, leading to rapid and reversible oxygen loading. When fully loaded with oxygen, it is called oxyhemoglobin, while hemoglobin that has released oxygen is called reduced hemoglobin or deoxyhemoglobin. As hemoglobin binds oxygen,...
4.4K
Protein Families02:47

Protein Families

Protein families are groups of homologous proteins; that is, they have similarities in amino acid sequences and three-dimensional structures. Protein families usually occur because of gene duplication, where an additional copy of a gene is inserted into the genome of an organism.   Mutations that change the amino acids but still allow the protein to be properly synthesized, will lead to new protein family members.   If these new proteins contain similar amino acids in key...
16.2K