Dylight 488, Rabbit Anti-Goat IgG

Reactivity: Goat

What it means: This secondary antibody is designed to recognize goat primary antibodies (e.g., goat IgG). It binds to the primary antibody and enables detection through its conjugate (enzyme or fluorophore).

Why it matters: Choose “Goat” reactivity when your primary antibody is raised in goat. Note that in goat-derived samples, endogenous goat immunoglobulins may contribute to background in certain applications.

Host: Rabbit

What it means: “Host” refers to the animal in which the secondary antibody was produced. Host: Rabbit means the antibody was generated by immunizing a rabbit, and the resulting rabbit antibodies were collected and purified to make this secondary antibody.

Why it matters: The host species can affect background and cross-reactivity. For best results, avoid using a rabbit-host secondary in workflows where rabbit immunoglobulins are present (e.g., rabbit primary antibodies in the same assay, rabbit serum-based blocking, or rabbit-derived samples), unless the protocol includes appropriate blocking and controls.

This secondary antibody is conjugated with DyLight 488, enabling direct fluorescent detection in the green channel.

What it does: DyLight 488 is a green fluorescent dye commonly excited by a 488 nm laser or FITC/GFP filter set. After the DyLight 488-labeled secondary antibody binds to your primary antibody, you can visualize the target using a fluorescence microscope or imaging system with DyLight 488-compatible filters (typically excitation ~493 nm, emission ~518 nm).

Why it matters: DyLight 488-conjugated secondary antibodies are widely used for immunofluorescence (IF), flow cytometry, and other fluorescence-based assays. It offers bright signal and good photostability, making it a reliable choice for green-channel imaging and multi-color staining with orange/red or far-red fluorophores.

Application(s): IF, ICC, FCM

IF (Immunofluorescence): Used as a secondary antibody to bind the primary antibody and provide a fluorescent signal for target visualization under a fluorescence microscope (depending on the conjugate and filter set).

ICC (Immunocytochemistry): Used as a secondary antibody to detect primary antibodies bound to cellular targets in fixed cells, enabling fluorescent imaging of protein localization with the appropriate conjugate.

FCM (Flow Cytometry): Used as a secondary antibody to label primary antibody–bound cells for fluorescence-based detection and analysis by flow cytometry (matched to the instrument’s laser and emission channels).

Isotype: Rabbit IgG

What it means: This secondary antibody is a rabbit-derived immunoglobulin G (IgG). In other words, it is an IgG antibody produced in rabbit and purified for use as a secondary reagent.

Why it matters: “Rabbit IgG” is mainly useful for understanding the species origin and antibody class of the secondary antibody:

• Species origin (rabbit): This tells you the secondary itself is made in rabbit. If your sample contains rabbit immunoglobulins (e.g., rabbit serum/plasma, rabbit tissue, or you are working in rabbit models), endogenous rabbit IgG can contribute to background. In such cases, additional blocking or an alternative secondary/detection strategy may be needed.
• Antibody class (IgG): IgG is the most commonly used antibody class for secondary reagents and typically provides strong, reliable performance in routine detection workflows.
• Detection and capture compatibility: Many detection/capture reagents are designed to bind IgG (e.g., anti-rabbit IgG reagents and, in some workflows, Protein A/G). Knowing it is rabbit IgG helps confirm compatibility when extra capture/detection steps are used.
• Controls: If you are using anti-rabbit detection reagents, “rabbit IgG” helps when selecting appropriate negative controls to evaluate non-specific binding from rabbit-derived antibodies.