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IgG antibody: size, dimension and comparison

The adopted reference is about 14 nm.

approximate extent

nm means nanometer: a unit used for molecules and tiny features in computer chips. Imagine 1 millimeter split into one million equal pieces: one piece measures 1 nm.

A defence protein with a Y-shaped outline.

Explore at this scale
IgG antibody, interpreted illustration
Interpreted illustration · dimension stated in the fact sheet.

What does this number measure?

A defence protein whose silhouette resembles a Y. The tips of an IgG antibody recognise particular molecular targets. The illustration simplifies a flexible structure whose different parts can change position.

Compare the stated dimensions

The comparison uses the number in each fact sheet: altitude, height, diameter, length or distance, depending on the reference. Two values in metres do not necessarily describe the same property.

Compare with Ribosome in the explorer →

Source and limitations

Catalogue order of magnitude; a source is provided, but this measurement has not been individually audited.

IgG antibody: a surface model suggesting the two Fab arms, hinge and Fc stem. Conformation and colours are interpreted, without validated atomic coordinates; approximate extent.