Three forms of superoxide dismutase are present in humans, in all other mammals, and most chordates. SOD1 is located in the cytoplasm, SOD2 in the mitochondria, and SOD3 is extracellular. The first is a dimer (consists of two units), whereas the others are tetramers (four subunits). SOD1 and SOD3 contain copper and zinc, whereas SOD2, the mitochondrial enzyme, has manganese in its reactive centre. The genes are located on chromosomes 21, 6, and 4, respectively (21q22.1, 6q25.3 and 4p15.3-p15.1).
Other articles related to "human, humans":
... moral issues that arise from people's sexuality in society and in human interactions ... Sexuality and reproduction are fundamental elements in human interaction and society worldwide ... Furthermore, "sexual restrictions" is one of the universals of culture peculiar to all human societies ...
... and sexuality See also Theology of the Body The Catholic Church affirms the sanctity of human life, from conception to natural death ... The Church believes the human being has been created in the "image and likeness of God", and that human life should not be weighed against other values such as economy, convenience, personal preferences ... and, behold, it was very good." then the human body and sex must likewise be good ...
... Normal vocalizations are very high-pitched, well outside the range of human hearing ... illustrates Henri Laborit's theories on evolutionary psychology and human behaviors by using short sequences in the storyline showing lab rat experiments ... In Harry Turtledove's science fiction novel Homeward Bound, humans unintentionally introduce rats to the ecology at the home world of an alien race which previously invaded Earth and introduced some of its own ...
... The date of the first human presence in Ivory Coast (also officially called Côte d'Ivoire) has been difficult to determine because human remains have not been well preserved in the country's humid climate ... in the country has been interpreted as a possible indication of a large human presence during the Upper Paleolithic period (15,000 to 10,000 BC), or at the minimum, the Neolithic period ...
Famous quotes containing the word human:
“The mimes become its food,
And seraphs sob at vermin fangs
In human gore imbued.”
—Edgar Allan Poe (18091849)
“The human mind is like Salome at the beginning of dance, hidden from the outside world by seven veils. Veils of reserve, shyness, fear.”
—Muriel Box (b. 1905)
“Royalty is a government in which the attention of the nation is concentrated on one person doing interesting actions. A Republic is a government in which that attention is divided between many, who are all doing uninteresting actions. Accordingly, so long as the human heart is strong and the human reason weak, Royalty will be strong because it appeals to diffused feeling, and Republics weak because they appeal to the understanding.”
—Walter Bagehot (18261877)