Virus Tracer Products
Neural circuit mapping relies heavily on tracers to delineate neuronal projections and connectivity. While traditional chemical tracers like horseradish peroxidase and dextran amine were foundational, their limitations—including non-specific labeling, inconsistent transsynaptic efficiency, and significant signal decay—restrict their utility. Viral tracers, leveraging genetic engineering, overcome these challenges, offering superior cell-type specificity, reduced toxicity, and robust transsynaptic transmission.
Viral tracers are indispensable tools across diverse neuroscience domains, from pain modulation and anxiety behavior studies to intricate neural circuit analysis. We offer a comprehensive suite of viral tracer products, encompassing anterograde, retrograde, and transsynaptic tracing capabilities.
Virus Type
Viral tracers are broadly classified by their synaptic transmission capability: transsynaptic and non-transsynaptic. Transsynaptic viruses (e.g., PRV, RV, CAV-2) propagate across synapses, enabling the mapping of interconnected neural networks. Conversely, non-transsynaptic viruses restrict infection to local neurons. Furthermore, tracers are categorized by their transport direction: anterograde and retrograde. Anterograde tracers (e.g., AAV, HSV) move along axons, tracing downstream projections, while retrograde tracers (e.g., retrograde AAV) travel along dendrites, revealing upstream connections.
Advantages of Viral Tracers
Our viral tracers offer distinct advantages for precise neural circuit mapping:
- Targeted Labeling: Gene editing enables precise labeling of specific neuronal populations, overcoming the limitations of traditional tracers.
- Synaptic Pathway Tracing: Modified transsynaptic viruses (e.g., PRV, RV) facilitate the mapping of intricate neural connections.
- Enhanced Safety: Virulence gene deletion, such as PRV envelope protein removal, significantly reduces toxicity, ensuring suitability for prolonged studies.
- Advanced Circuit Analysis: Innovative tracers, like three-level loop tracing, enable comprehensive multi-level neural circuit investigations.
Tracer Types
As a leading contract research organization (CRO), we offer comprehensive, customized viral tracer services tailored to diverse neuroscience research needs.
Please browse through our premade viruses list of viral tracers to find the right viral tracers for your experiment.
Virus tracers are highly efficient, non-toxic, and versatile to meet a variety of research needs. Please visit our website to learn more about our products and contact us for customized solutions.
Intellectual Property
Creative Biolabs is a contract manufacturer that produces tailored viruses and vectors according to client specifications. Importantly, this manufacturing service does not grant Creative Biolabs any intellectual property ownership; all designs and associated intellectual property rights remain exclusively with the customer.
Certain vector components may be subject to third-party intellectual property rights. Creative Biolabs offers publicly available sequence information for these components as a convenience for reference only. The customer assumes full responsibility and liability for the use of these components in their custom vectors. By purchasing vectors containing such components, the customer confirms they have secured all necessary intellectual property licenses, including the right to engage Creative Biolabs for manufacturing.



AAV2 Full Capsids
- Tracer Type:
- AAV Capsid
- Applications:
- Control


- Tracer Type:
- Optogenetics
- Applications:
- Optogenetics


- Tracer Type:
- Anterograde tracing virus
- Applications:
- Neural Tracing

Express FLPo recombinase under CAG promoter in a Cre-dependent manner.
- Tracer Type:
- Recombinase

Cre-dependent and express CaMPARI2 under mature neuron specific hSyn promoter.
- Tracer Type:
- Calcium Sensor

Express FLPo recombinase under CAG promoter
- Tracer Type:
- Recombinase

- Tracer Type:
- Apoptosis/Killing

- Tracer Type:
- Helper virus

This AAV expresses oG driven by CAG Promoter in a Cre-dependent manner.
oG (optimized glycoprotein) is a codon-optimized version of a chimeric glycoprotein consisting of the transmembrane/cytoplasmic domain of B19G and the extracellular domain of rabies Pasteur virus strain glycoprotein. It has been reported that oG increases the tracing efficiency for long-distance input neurons up to 20-fold compared to B19G.
- Tracer Type:
- Neuronal circuitry

- Tracer Type:
- Chemogenetics

Retrograde multisynaptic tracing
- Tracer Type:
- Retrograde tracing

- Tracer Type:
- Calcium Sensor

Neurotracing
- Tracer Type:
- Neurotracing

A fascinating tool to detect neuronal circuitry
- Tracer Type:
- Neuronal circuitry

A fascinating tool to detect neuronal circuitry
- Tracer Type:
- Neuronal circuitry

A fascinating tool to detect neuronal circuitry
- Tracer Type:
- Neuronal circuitry

Retrograde multisynaptic tracing
- Tracer Type:
- Retrograde tracing

Neuron silencing
- Tracer Type:
- Chemogenetics

Neuron silencing
- Tracer Type:
- Chemogenetics

Neuron silencing
- Tracer Type:
- Chemogenetics

Neuron silencing
- Tracer Type:
- Chemogenetics

Neuron activation
- Tracer Type:
- Chemogenetics

Neuron activation
- Tracer Type:
- Chemogenetics

Neuron activation
- Tracer Type:
- Chemogenetics


- Tracer Type:
- Helper virus

New generation green 5-HT fluorescent probe
- Tracer Type:
- Neurotransmitter sensor

Brand new red 5-HT fluorescent probe
- Tracer Type:
- Neurotransmitter sensor

Orientation-specific induction of an E-SARE-driven

- Tracer Type:
- Optogenetics
- Applications:
- Optogenetic Switche
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