The predominant isozyme of LDH in cardiac muscle is:: (A) LD-1, (B) LD-2, (C) LD-3, (D) LD-5
Answer is A. LD-1 is the predominant isoenzyme of LDH in cardiac muscle. Ref: Harper's Principles of Internal Medicine, 26th Edition, Page 57; Textbook of Biochemistry By Vasudevan, 5th Edition, Page 53