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Iron can be stored in ferritin as ferric iron due to the ferroxidase activity of the ferritin heavy chain. [43] Dysfunctional ferritin may accumulate as hemosiderin, which can be problematic in cases of iron overload. [44] The ferritin storage iron pool is much larger than the labile iron pool, ranging in concentration from 0.7 mM to 3.6 mM. [40]
Iron is also the most abundant transition metal in the human body and it is used in various processes like oxygen transport and ATP production. It plays a key role in the function of enzymes like cytochrome a , b and c as well as iron-sulfur complexes which play an important role in ATP production. [ 13 ]
The handicap principle is a disputed hypothesis proposed by the Israeli biologist Amotz Zahavi in 1975. It is meant to explain how "signal selection" during mate choice may lead to "honest" or reliable signalling between male and female animals which have an obvious motivation to bluff or deceive each other.
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References External links 0–9 19th hole The clubhouse bar. A ace When a player hits the ball directly from the tee into the hole with one stroke. Also called a hole in one. address The act of taking a stance and placing the club-head behind the golf ball. If the ball moves once a player has addressed the ball, there is a one-stroke penalty, unless it is clear that the actions of the player ...
NEW YORK (Reuters) -The man accused of killing a woman sleeping on a New York City subway car by setting her on fire after what prosecutors say was a night of heavy drinking pleaded not guilty to ...
An elderly straphanger was randomly shoved onto subway tracks at the Herald Square station in Manhattan on Sunday afternoon, according to police.
Iron overload (also known as haemochromatosis or hemochromatosis) is the abnormal and increased accumulation of total iron in the body, leading to organ damage. [1] The primary mechanism of organ damage is oxidative stress, as elevated intracellular iron levels increase free radical formation via the Fenton reaction.