For this to happen the DNA must replicate itself exactly. When DNA replicates itself and the cell divides both of the new cells that are produced contain the exact same DNA (barring mutations) which means both new cells can code to make the same proteins.
Americium was first produced in 1944 by the group of Glenn T. Seaborg at the University of California, Berkeley. Although it is the third element in the transuranic series, it was discovered fourth, after the heavier curium.
Periodic Table of Elements: LANL. Chemistry Division Â» Periodic Table of Elements. Back to Elements List. Americium was the fourth synthetic transuranic element to be discovered and was named after the continent of North America by analogy to its lighter lanthanide homologue, europium, which was named after Europe, its continent of discovery.