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Three proteinaceous iron–sulfur reaction centers are found in PSI. Labeled F x, F a, and F b, they serve as electron relays. [18] F a and F b are bound to protein subunits of the PSI complex and F x is tied to the PSI complex. [18] Various experiments have shown some disparity between theories of iron–sulfur cofactor orientation and ...
Absorption of dietary iron in iron salt form (as in most supplements) varies somewhat according to the body's need for iron, and is usually between 10% and 20% of iron intake. Absorption of iron from animal products, and some plant products, is in the form of heme iron, and is more efficient, allowing absorption of from 15% to 35% of intake.
Marcona Mine 1,400 million tonnes iron ore; Pampa de Pongo 1,000 million tonnes 75% magnetite; Mina Justa copper-gold deposit [14] Some authors (e.g., Skirrow et al. 2004) consider the iron ore deposits of Kiruna, Sweden as being IOCG deposits. Similar styles of fault-hosted magnetite-hematite breccias with minor copper-gold mineralisation and ...