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Molecule of the Month

August 2026

Histone Ubiquitination and Deubiquitination Complexes

Enzymes that add and remove marks from chromosomes to keep gene regulation in balance

3D View: 4R8P

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Guide to Understanding PDB Data

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SciArt Galleries

Irving Geis (1908-1997) was a gifted artist who helped illuminate the field of structural biology with his iconic images. The Geis Digital Archive features many of his illustrations in the context of their molecular structures.

Lysozyme (512)

DNA

Myoglobin

Hemoglobin

Induced Lac Repressor

Myoglobin Fold

Aspartate Transcarbamoylase (ATCase)

Myohemerythrin

Tomato Bushy Stunt Virus (TBSV)

Carboxypeptidase A

Oxyhemoglobin

Collagen

Crambin

Intermolecular Contacts in Hemoglobin S

Immunoglobulin G (IgG)

Cytochrome c

Ribonuclease S

Trypsin

Cytochrome c (unbound)

Deoxyribonucleic Acid (DNA)

DPG-Hemoglobin Complex

Deoxyhemoglobin

Lac Repressor

Lysozyme (488)

Transfer Ribonucleic Acid (tRNA)

Hemoglobin (1000)

Hemoglobin S

Z-DNA

TATA-Binding Protein (TBP)

B-DNA

A-DNA

The Molecular Landscapes by David S. Goodsell integrate information from structural biology, microscopy and biophysics to simulate detailed views of the molecular structure of living cells.

Illustrations are free for use under a CC-BY-4.0 license