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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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Rainbow Chain Structure

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Guide to Understanding PDB Data

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Exploring the Workhorses of Biotechnology: Using RCSB.org to analyze plastic-degrading enzymes

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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.

Cytochrome c (unbound)

Collagen

Trypsin

Deoxyribonucleic Acid (DNA)

DPG-Hemoglobin Complex

Oxyhemoglobin

Hemoglobin (1000)

Myoglobin

Crambin

Lysozyme (488)

Ribonuclease S

Aspartate Transcarbamoylase (ATCase)

DNA

Myoglobin Fold

Carboxypeptidase A

Cytochrome c

Deoxyhemoglobin

TATA-Binding Protein (TBP)

Immunoglobulin G (IgG)

Lac Repressor

A-DNA

Hemoglobin

Hemoglobin S

Intermolecular Contacts in Hemoglobin S

Z-DNA

Induced Lac Repressor

Transfer Ribonucleic Acid (tRNA)

Myohemerythrin

B-DNA

Lysozyme (512)

Tomato Bushy Stunt Virus (TBSV)

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