Serum iron in other molecules in cells throughout the body. None of this iron is directly accessible by testing the serum. However, some iron is circulating in the serum. Transferrin is a molecule produced by the liver that binds one or two iron(III) ions, i.e. ferric iron, Fe; transferrin is essential if stored iron is to be moved and used. Most of the time, about 30% of the available sites on the transferrin molecule are filled. The test for serum iron uses blood drawn from veins to measure the iron molecules that are bound to transferrin, and circulating in the blood. The
Greatest Hits (Blood, Sweat & Tears album) Greatest Hits (Blood, Sweat & Tears album) Greatest Hits is a compilation album by the band Blood, Sweat & Tears, initially released in 1972. Although Blood, Sweat & Tears continued to record and tour for several more years, the band's lineup changed dramatically after "Blood, Sweat & Tears 4". This compilation album includes all of the group's best-known material up to that time. This was the group's last album to earn a Gold Record award. Columbia initially chose to incorporate the edited single versions of many of the songs, a decision which was poorly received by some fans. Some later