Protein Analysis

<h2>What are Bioluminescence Assays?</h2>
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Bioluminescence assays use luciferase enzymes to convert specific substrates into light, producing a highly sensitive readout for gene expression studies or cell viability measurements. In ATP-based systems, light output correlates with cellular ATP levels and therefore cell viability.
Firefly luciferase uses luciferin along with ATP, magnesium, and oxygen to generate a green/yellow signal with a decay time of roughly 12 minutes. Renilla luciferase uses coelenterazine and oxygen, producing a faster-decaying blue signal and not requiring ATP.
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<h2 dir="ltr">What you will find:</h2>
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Luciferase Assay Systems: High-performance kits like the Luciferase Assay Kit (G287), designed for rapid, flash-type bioluminescence detection that provides a direct and sensitive measure of gene induction.
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Fluorescent Control Proteins: Premium GFP Purified Protein (000033P) available as a reliable internal standard or calibration marker to validate transfection efficiency and protein localization across diverse imaging platforms.
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<h2>How to Choose a Bioluminescence Assay System</h2>
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Decide Between Single and Dual-Reporter Designs
Dual-reporter systems combine a test luciferase with a constitutively expressed control luciferase, allowing normalization for variability in transfection efficiency, cell number, and viability.
Choose NanoLuc for Maximum Sensitivity
NanoLuc is an engineered 19 kDa luciferase that produces approximately 100&ndash;150&times; brighter signal than firefly or Renilla systems and uses furimazine as its substrate.
Match Substrate and Cofactor Requirements
Firefly luciferase requires luciferin, ATP, Mg2+, and oxygen, while Renilla luciferase requires coelenterazine and oxygen only, which is important when ATP levels are part of the experimental variable.
Consider Destabilized Reporters for Faster Response
Destabilized luciferase variants have shorter intracellular half-lives, allowing more rapid detection of transcriptional changes with reduced signal lag.
Use ATP-Based Assays for Viability
ATP-based bioluminescence assays measure cellular viability rather than gene expression, as light output reflects ATP levels in metabolically active cells.
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<h2>Specifications Context</h2>
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The Dual-Luciferase Reporter system combines firefly and Renilla luciferase to allow sequential measurement using a luciferase inhibitor for normalization of experimental variability.
As of 2026, NanoLuc-based systems are increasingly used beyond traditional reporter gene assays, including protein interaction and target engagement studies due to their high brightness and low background.
Enhance your signal detection&mdash;<a href="https://mbpinc.net/contact-us">contact the MBP team</a> today for a quote on our professional bioluminescence solutions.

Bioluminescence Assays and Reagents

QC - CoA, Lot VG1010

GFP Purified Protein

Unit Quantity

Storage Condition

Shipping Condition

Luc Gene Test with G287 Report-2

Luciferase Assay Kit

Luciferase Assay Kit (G287) by ABM delivers 500 reactions for firefly luciferase reporter gene quantification in mammalian and bacterial cell cultures, with a two-reagent workflow and luminescence readout within 30 minutes.

Usage

Sterility

<h2>What are Protein Crosslinking, Labeling, and Modification Reagents?</h2>
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These reagents covalently bond proteins together or attach functional labels to proteins for downstream analysis. They are broadly divided into homobifunctional and heterobifunctional crosslinkers based on the type of reactive groups they contain.
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<h2 dir="ltr">What you will find:</h2>
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Ni-IDA Agarose Resins: High-capacity purification systems (G250) utilizing immobilized Ni2+ cations and iminodiacetic acid groups for the rapid, one-step isolation of His-tagged proteins under both native and denaturing conditions.
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Versatile Purification Formats: Ready-to-use resins suitable for batch or gravity-flow chromatography, offering an economical and reusable solution for antibody purification and the study of protein-DNA interactions at any scale.
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<h2>How to Choose Crosslinking and Labeling Reagents</h2>
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Decide Between Homobifunctional and Heterobifunctional Chemistry
Homobifunctional crosslinkers contain identical reactive groups at both ends and are used to stabilize or capture existing protein interactions. Heterobifunctional crosslinkers contain two different reactive groups, allowing controlled stepwise conjugation between specific molecules.
Choose Water-Soluble Crosslinkers for Aqueous or Cellular Work
BS3 is the water-soluble form of DSS and is preferred for reactions in aqueous buffers or intact cell systems while maintaining the same chemistry and spacer length.
Match Spacer Arm Length to Molecular Distance
The spacer arm determines the maximum distance between two reactive groups that can be linked. Incorrect spacing can reduce efficiency or increase non-specific crosslinking.
Use Heterobifunctional Chemistry for Defined Conjugates
Sulfo-SMCC enables sequential coupling of amine-containing molecules with sulfhydryl-containing partners, commonly used for antibody-enzyme or antibody-carrier conjugation workflows.
Consider Cleavable Crosslinkers for Reversible Studies
Cleavable crosslinkers such as DTSSP contain disulfide bonds that can be reduced later, enabling separation of linked proteins for downstream analysis such as mass spectrometry.
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<h2>Specifications Context</h2>
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DSS has an 11.4 &Aring; spacer arm that defines the maximum distance between linked amine groups, while BS3 provides the same chemistry with improved water solubility for aqueous applications. Cleavable crosslinkers are increasingly used in mass spectrometry workflows for mapping protein-protein interactions.
Streamline your protein modification workflows&mdash;<a href="https://mbpinc.net/contact-us">contact the MBP team</a> today for a quote on our professional Ni-IDA resin solutions.