Which of the following is true about lactate dehydrogenase (LDH)?
A) There are two types of subunits, H amd M, that combine to form 5 types of isozymes
B) An increase in H-based isozymes was once used to diagnose heart attacks
C) An increase in blood levels of LDH of any kind is indicative of some sort of problem
D) One type of LDH has only H subunits
E) All of the choices

Question

Quizplus · Accepted Answer

Lactate dehydrogenase (LDH) has two types of subunits, H (heart) and M (muscle), which combine in different ways to form 5 types of isozymes. An increase in H-based isozymes was historically used to diagnose heart attacks, and an increase in blood levels of LDH generally indicates some form of tissue damage or disease. One type of LDH is composed entirely of H subunits, known as LDH-1, which is most abundant in heart tissue.

Which of the Following Is True About Lactate Dehydrogenase (LDH)