Creatine kinase-MM(CK-MM) Human,
Mouse Monoclonal Antibody, Clone: 2C5

Introduction to the Molecule

Creatine kinase (CK), also known as phosphocreatine kinase or creatine phosphokinase (CPK) is an enzyme expressed by various tissue types. It catalyzes the reversible transfer of the N-phosphoryl group from phosphocreatine (PCr) to ADP to regenerate ATP. Creatine kinase plays a key role in the energy homeostasis of cells with intermittently high, fluctuating energy requirements, such as skeletal and cardiac muscle cells, neurons, photoreceptors, spermatozoa and electrocytes. Creatine kinase consists of two subunits, which can be either B (brain type) or M (muscle type). Therefore, three different cytosolic isoenzymes exist: CK-MM, CK-BB and CK-MB. Cytosolic CK isoenzymes are always co-expressed in a tissue-specific fashion together with a mitochondrial isoform. Skeletal muscle expresses CK-MM (98%) and low levels of CK-MB (1%). The heart muscle expresses CK-MM at 70% and CK-MB at 25–30%. CK-BB is expressed in all tissues at low levels. Cytosolic CKs, in close conjunction with Ca2+-pumps, play a crucial role for the energetics of Ca2+- homeostasis. Octameric mitochondrial Mi-CK binds and crosslinks mitochondrial membranes. The CK system is regulated by AMP-activated protein kinase via PCr/Cr and ATP/AMP ratios. The cardiac-specific isoenzyme of creatine kinase, CKMB, is a biomarker for myocardial infarction along with other markers such as cardiac Troponin I and myoglobin. The introduction of immunologic mass determination of CK-MB was a major breakthrough that replaced the traditional enzymatic assay.

Source of Antigen

E.coli

Host

Mouse

Isotype

IgG1, kappa

Preparation

Hepes with 0.15M NaCl, 0.01% BSA, 0.03% sodium azide, and 50% glycerol

Species Reactivity

Human (+), Mouse (NT), Rat (NT)

Storage/Stability

Store for 1 year at –20°C from date of shipment

Applications

Western blotting

By molecule:

• Creatine kinase