And it's the H isime chain that is expressed predominantly in high concentration in the cardiac muscle cell. And it's the mike chain that is expressed in high concentration predominantly in the skeletal muscle cell. So if we examine the lactate dehydrogenase in skeletal muscle cells, we're basically going to find a quaternary structure that consists of these four individual chains, where these four individual chains are all the Mi design chains. So each one of these red chains is basically that Mi design chain. On the other hand, if we study the cardiac muscle cells, we're going to see the coronary structure of the LDH basically consists of four individual H I design chains and these are shown in purple. So this lactate dehydrogenase, which is basically denoted with H four, where H means we have the H ISome and four means we have four of these individual A chains.