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Anti-MLC-2/MYL2 Antibody, clone 19D3.1 ZooMAb® Mouse Monoclonal

enhanced validationgreener alternative

recombinant, expressed in HEK 293 cells

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Cardiac myosin light chain 2, MLC-2s/v, MLC-2v, Myosin light chain 2, slow skeletal/ventricular muscle isoform, Myosin regulatory light chain 2, ventricular/cardiac muscle isoform, Ventricular myosin light chain 2

biological source


Quality Level


expressed in HEK 293 cells



antibody form

purified antibody

antibody product type

primary antibodies


19D3.1, recombinant monoclonal


recombinant, expressed in HEK 293 cells

product line

ZooMAb® learn more



mol wt

calculated mol wt 18.79 kDa
observed mol wt ~18 kDa

purified by

using protein G

species reactivity

mouse, human, rat


antibody small pack of 25 μL

greener alternative product characteristics

Waste Prevention
Designing Safer Chemicals
Design for Energy Efficiency
Learn more about the Principles of Green Chemistry.

enhanced validation

recombinant expression
Learn more about Antibody Enhanced Validation


immunofluorescence: suitable
immunohistochemistry: suitable
western blot: suitable



epitope sequence


Protein ID accession no.

UniProt accession no.

greener alternative category

shipped in


storage temp.


Gene Information

human ... MYL2(4633)

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This Item
Gene Information

human ... MYL2(4633)

Gene Information

human ... MYH1(4619)

Gene Information

human ... MYH7(4625)
mouse ... Myh7(140781)
rat ... Myh7(29557)

Gene Information

human ... CD247(919)


19D3.1, recombinant monoclonal


1E15, recombinant monoclonal


1B19, monoclonal, recombinant monoclonal


1N11, recombinant monoclonal









antibody form

purified antibody

antibody form

purified antibody

antibody form

purified antibody

antibody form

purified antibody

biological source


biological source

rabbit (recombinant)

biological source

rabbit (recombinant)

biological source


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General description

We are committed to bringing you greener alternative products, which adhere to one or more of The 12 Principles of Green Chemistry. This antibody is Preservative-free, produced without the harm or sacrifice of animals and exceptionally stable to allow for ambient shipping and storage if needed and thus aligns with "Waste Prevention", "Designing Safer Chemicals" and "Design for Energy Efficiency". Click here for more information.
ZooMAb® antibodies represent an entirely new generation of recombinant monoclonal antibodies. Each ZooMAb® antibody is manufactured using our proprietary recombinant expression system, purified to homogeneity, and precisely dispensed to produce robust and highly reproducible lot-to-lot consistency. Only top-performing clones are released for use by researchers. Each antibody is validated for high specificity and affinity across multiple applications, including its most commonly used application. ZooMAb® antibodies are reliably available and ready to ship when you need them.


Clone 19D3.1 is a ZooMAb® mouse recombinant monoclonal antibody that specifically detects MLC-2/MYL2.


GST-tagged recombinant protein corresponding to human MLC-2.


Quality Control Testing

Evaluated by Western Blotting in C2C12 cell lysate.

Western Blotting Analysis: A 1:1,000 dilution of this antibody detected MLC-2/MYL2 in C2C12 cell lysate.

Tested Applications

Western Blotting Analysis: A 1:10,000 and 1:1,000 dilution from a representative lot detected MLC-2/MYL2 in lysates from Human skeletal muscle and L6 cells, respectively

Immunofluorescence Analysis: A 1:1,000 dilution from a representative lot detected MLC-2/MYL2 in human heart tissue sections.

Immunohistochemistry (Paraffin) Analysis: A 1:1,000 dilution from a representative lot detected MLC-2/MYL2 in human heart and rat heart tissue sections.

Note: Actual optimal working dilutions must be determined by end user as specimens, and experimental conditions may vary with the end user.

Target description

Myosin regulatory light chain 2, ventricular/cardiac muscle isoform (UniProt: P10916; also known as MLC-2, ; MLC-2v, Cardiac myosin light chain 2, Myosin light chain 2, slow skeletal/ventricular muscle isoform, MLC-2s/v, Ventricular myosin light chain 2) is encoded by the MYL2 (also known as MLC2) gene (Gene ID: 4633) in human. Myosins belong to a family of actin-based motor molecular motors with ATPase activity that is essential for muscle contraction. Myosins form regular bipolar thick filaments that, together with actin thin filaments, constitute the fundamental contractile unit of skeletal and cardiac muscle. Muscle myosin is a hexameric protein that consists of 2 heavy chain subunits (MHC), 2 alkali light chain subunits (MLC) and 2 regulatory light chain subunits (MLC-2). Fast and slow mammalian muscle myosins differ in their heavy chain sequences. Muscles expressing the two isoforms contract at markedly different velocities. MLC-2 is highly expressed in type I muscle fibers and plays a role in heart development and function. It is phosphorylated by myosin light chain kinase 3 (MYLK3) and myosin light chain kinase 2 (MYLK2), which promotes cardiac muscle contraction and function. Following phosphorylation, it plays a role in cross-bridge cycling kinetics and cardiac muscle contraction by increasing myosin lever arm stiffness and promoting myosin head diffusion, as a consequence of the increase in maximum contraction force and calcium sensitivity of contraction force. These events are reported to slow down myosin kinetics and prolong duty cycle resulting in accumulated myosins being cooperatively recruited to actin binding sites to sustain thin filament activation as a means to fine-tune myofilament calcium sensitivity to force. During cardiogenesis, it plays an early role in cardiac contractility by promoting cardiac myofibril assembly. Mutations in MYL2 gene are known to cause familial hypertrophic cardiomyopathy that is characterized by ventricular hypertrophy, dyspnea, syncope, palpitations, and chest pain. This ZooMAb® recombinant monoclonal antibody, generated by our propriety technology, offers significantly enhanced specificity, affinity, reproducibility, and stability over conventional monoclonals. (Ref.: Manivannan, SN., et al. (2020). PLoS Genet. 16(5); e1008639;  Iorga, B., et al. (2007). J. Biol. Chem. 282(6); 3559-3570).

Physical form

Purified recombinant mouse monoclonal antibody IgG, lyophilized in PBS, 5% Trehalose, normal appearance a coarse or translucent resin. The PBS/trehalose components in the ZooMAb formulation can have the appearance of a semi-solid (bead like gel) after lyophilization. This is a normal phenomenon. Please follow the recommended reconstitution procedure in the data sheet to dissolve the semi-solid, bead-like, gel-appearing material. The resulting antibody solution is completely stable and functional as proven by full functional testing. Contains no biocide or preservatives, such as azide, or any animal by-products. Larger pack sizes provided as multiples of 25 µL.


0.3 mg/mL after reconstitution at 25 µL per vial. Please refer to guidance on suggested starting dilutions and/or titers per application and sample type.

Storage and Stability

Recommend storage of lyophilized product at 2-8°C; Before reconstitution, micro-centrifuge vials briefly to spin down material to bottom of the vial; Reconstitute each vial by adding 25 µL of filtered lab grade water or PBS; Reconstituted antibodies can be stored at 2-8°C, or -20°C for long term storage. Avoid repeated freeze-thaws.

Other Notes

Concentration: Please refer to the Certificate of Analysis for the lot-specific concentration.

Legal Information

ZooMAb is a registered trademark of Merck KGaA, Darmstadt, Germany


Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.

Storage Class

11 - Combustible Solids




Not applicable


Not applicable

Certificates of Analysis (COA)

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