hemoglobin A

Directory

References

Discover

Title: Senate Square, St. Petersburg, December 14, 1825: repression of the troop mutiny - watercolor by Carl Ivanovitch Kollman, 1825 depicts Decembrist uprising clashing with cavalry, with spectators watching. (new style December 26, 1825) Europe. Saint

8 of the Largest Empires in History

Thanksgiving Turkey with all the sides

Why Do We Eat Turkey on Thanksgiving?

Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.

10 Famous Artworks by Leonardo da Vinci

Cheetah (Acinonyx jubatus) standing on rock, side view, Masai Mara National Reserve, Kenya

The Fastest Animals on Earth

Nativity Scene, Adoration of the Magi, Church of the Birth of the Virgin Mary, Montenegro

Why Is Christmas in December?

illustration of the walking titanosaurus, Patagotitan mayorum

Titanosaurs: 8 of the World's Biggest Dinosaurs

bat flying

Are Bats Really Blind?

hemoglobin A

biochemistry

Also known as: Hb A

Learn about this topic in these articles:

blood disease

In blood disease: Thalassemia and hemoglobinopathies
Normal adult hemoglobin (Hb A) consists of globin containing two pairs of polypeptide chains, alpha (α) and beta (β). A minor fraction of normal adult hemoglobin consists of Hb A₂, which contains α- and delta- (δ-) chains. A different hemoglobin (Hb F) is present in fetal life and…
Read More

operation of natural selection

In evolution: Overdominance
The gene Hb^A codes for the normal β hemoglobin chain, which consists of 146 amino acids. A mutant allele of this gene, Hb^S, causes the β chain to have in the sixth position the amino acid valine instead of glutamic acid. This seemingly minor substitution modifies the…
Read More