The most important ore of this element is a sulfide known as sphalerite, and a protein motif relying on this element coordinates two cysteines and two histidines.
LIM domains contain two atoms of this element, and one protein incorporating this element possesses a TGEKP linker. An iodomethyl iodide of this element is reacted with alkenes to make cyclopropane in the Simmons-Smith reaction, and beta-hydroxy-esters are synthesized from aldehydes and alpha-halo esters using a metallic catalyst of this element in the (*) Reformatsky reaction. The most important ore of this element is a sulfide known as sphalerite, and a protein motif relying on this element coordinates two cysteines and two histidines. That motif is important for DNA-binding and is this element's namesake finger. For 10 points, name this element with atomic number 30 and symbol Zn.
LIM domains contain two atoms of this element, and one protein incorporating this element possesses a TGEKP linker.
zinc [accept Zn early]