SciFig

Free Antibody Structure Diagram Generator

Create an IgG structure schematic with two heavy chains, two light chains and independently labeled Fab, Fc, variable and constant regions.

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IgG antibody structure

Choose a finite scientific preset, edit labels and export the result locally.

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Free Antibody Structure Diagram Generator— templates & examples

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Antibody structure diagram tools

Free Antibody Structure Diagram Generator

Create an IgG structure schematic with two heavy chains, two light chains and independently labeled Fab, Fc, variable and constant regions.

An antibody structure diagram identifies heavy and light chains, antigen-binding regions and the Fc region of an immunoglobulin. Create an IgG structure schematic with two heavy chains, two light chains and independently labeled Fab, Fc, variable and constant regions.

IgG schematic showing two heavy chains, two light chains, highlighted variable regions, Fab arms and an Fc stem
  • Show two heavy chains
  • Identify both Fab arms
  • Locate variable regions at the tips
  • Show disulfide connections

Antibody Structure Diagram Features

SciFig’s antibody structure diagram brings the inputs, diagram choices and exported result into one focused tool.

Distinguish heavy and light chains

Choose separate heavy- and light-chain colors to follow the two heavy and two light chains through the Y-shaped IgG schematic. The chain labels and geometry remain visible alongside the selected colors, helping readers distinguish chain identity from the functional regions spanning those chains.

  • Show two heavy chains
  • Show two light chains
  • Keep chain identity visible
Distinguish heavy and light chains

Identify Fab and Fc regions

Label the antigen-binding arms as Fab regions and the stem as Fc. These regions describe different functional parts of the antibody, rather than four separate chains. Keeping the labels on the structure helps connect an explanation of binding and effector functions with the corresponding locations.

  • Show or hide the Fab labels
  • Show or hide the Fc label
  • Edit visible structural annotations
Identify Fab and Fc regions

Show variable and constant domains

Display variable-region and constant-region annotations when the audience needs more detail than a Y-shaped outline. The variable regions lie toward the tips of the antigen-binding arms. Label controls let the figure focus on those domain locations or return to a simpler chain-level explanation.

  • Locate variable regions at the tips
  • Identify constant regions
  • Choose the visible annotations
Show variable and constant domains

Prepare an IgG teaching figure

Use SciFig’s antibody structure diagram to add a title, edit the structural labels and download SVG or PNG. Disulfide annotations can support a discussion of how the chains are connected. The result is an IgG structural schematic for explanation rather than a predicted atomic model or an illustration of every antibody class.

  • Show disulfide connections
  • Choose a focused title
  • Download a structure schematic
Prepare an IgG teaching figure

How to Create the Figure

Use the antibody structure diagram controls below to prepare the figure from your selected mechanism and labels.

  1. Choose an IgG structure preset

    Start with the IgG overview or a focused structure example. The two heavy and two light chains remain distinguishable by their drawing and colors. Choose a view that matches whether your explanation emphasizes chains, functional regions or variable domains.

  2. Set variable-region and bond detail

    Turn variable-region highlighting and disulfide-bond visibility on or off. These options change the structural details visible in the IgG schematic. Keep the detail that supports the accompanying explanation, then edit the molecular and region labels as needed.

  3. Edit the title and labels

    Enter a descriptive title and replace the node or structure labels with the terminology used in your document. The preset retains its arrangement while the visible names change. Keep molecular abbreviations consistent with the explanation beside the figure.

  4. Download the labeled figure

    Choose SVG for a scalable vector figure or PNG for a slide, handout or document. The exported diagram retains the selected view and labels. Keep the figure alongside the corresponding explanation so later wording changes can be reflected in another export.

Antibody Structure Diagram Uses

Use a labeled antibody structure diagram to connect the explanation in your material with a visible figure.

IgG schematic showing two heavy chains, two light chains, highlighted variable regions, Fab arms and an Fc stem

Introduce immunoglobulin structure

Use the IgG outline to introduce how heavy and light chains form an antibody. Keep the chain labels visible and place the exported figure beside the written explanation. A shared reference image helps a class connect chain identity with the Y-shaped structure.

Explore this example
IgG structure with highlighted variable regions, Fab arms and a constant-region Fc stem

Explain antigen-binding regions

Focus on the Fab arms when discussing where antigen recognition occurs. Retain the variable-region annotations near the tips and keep Fc distinct. The structure gives a seminar audience a spatial reference for the functional terms being introduced.

Explore this example
IgG structure with Fab and Fc labels and highlighted variable tips, without disulfide annotations

Discuss Fc-dependent functions

A presentation about antibody effector functions can emphasize the Fc stem while keeping the Fab arms in context. Export a labeled structure diagram and pair it with the mechanism explanation. The structure panel identifies the region without predicting a particular immune outcome.

Explore this example
IgG schematic distinguishing heavy and light chains without variable-region highlighting

Prepare an antibody worksheet

Use a simplified view for an exercise and a labeled view for the accompanying explanation. The same chain geometry provides a consistent reference for naming heavy chains, light chains, Fab and Fc. PNG works for inserting these views into a handout.

Explore this example
IgG schematic showing hinge and disulfide annotations between the heavy and light chains

Introduce antibody-based assays

Place an IgG structure schematic near the start of a methods lesson before discussing how an antibody is used in an assay. Chain and binding-region labels clarify the vocabulary. A dedicated Western blot figure can then explain that separate experimental workflow.

Explore this example
IgG schematic showing two heavy chains, two light chains, highlighted variable regions, Fab arms and an Fc stem

Build an immunology slide panel

Export SVG when the antibody structure will be arranged with immune-cell or complement diagrams. Retain the chain and region distinctions at the final display size. The structure panel answers which part is which, while the accompanying diagrams explain interactions and downstream mechanisms.

Explore this example

How Researchers Use SciFig

The first slide in my antibody lesson needed to distinguish chains from functional regions. The antibody structure diagram showed heavy and light chains alongside the Fab and Fc labels. I exported that view for the handout so students could connect the terms with locations on the same IgG schematic during the discussion.

Celine P.

Immunology lecturer, University of Strasbourg

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Antibody structure diagram

Create a antibody structure diagram

Create a antibody structure diagram

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