Molecule of the Month
October 2026

Celebrating 55 Years of the PDB

Enabling the rapid evolution of protein structure prediction and design

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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.

Images used with permission from the Howard Hughes Medical Institute (www.hhmi.org). All rights reserved.

Aspartate Transcarbamoylase (ATCase)

Carboxypeptidase A

Tomato Bushy Stunt Virus (TBSV)

Transfer Ribonucleic Acid (tRNA)

Hemoglobin (1000)

Cytochrome c (unbound)

Oxyhemoglobin

Hemoglobin S

Myoglobin Fold

DPG-Hemoglobin Complex

Lysozyme (488)

Trypsin

Cytochrome c

Lysozyme (512)

TATA-Binding Protein (TBP)

Intermolecular Contacts in Hemoglobin S

DNA

Lac Repressor

Immunoglobulin G (IgG)

Deoxyribonucleic Acid (DNA)

Collagen

Ribonuclease S

Myoglobin

Deoxyhemoglobin

B-DNA

Induced Lac Repressor

A-DNA

Myohemerythrin

Z-DNA

Crambin

Hemoglobin

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

Casein Micelle and Fat Globule in Milk

Biosites: Muscle

Red Blood Cell Cytoskeleton

Influenza Virus

JCVI-syn3A Minimal Cell

HIV-Infected Cell

Insulin Release

Myoglobin in a Whale Muscle Cell

Poliovirus Neutralization

Zika Virus

Blood

Chloroplast

SARS-CoV-2 mRNA Vaccine

Transfer RNA and Gag Protein

Measles Virus Proteins

Cellulose Synthase

Model of a Mycoplasma Cell

Last Universal Common Ancestor

CytoSkeleton

Caulobacter Polar Microdomain

Autophagy

Bacteriophage T4 Infection

HIV Vaccine

HIV in Blood Plasma

Biosites: Blood Plasma

Collagen and Extracellular Matrix

Escherichia coli Bacterium

Kinetochore

Insulin Action

Respiratory Droplet

Mycoplasma mycoides

Biosites: Red Blood Cell

Myelin

Excitatory and Inhibitory Synapses

Phage-based COVID-19 Vaccine

Influenza Vaccine

Ebola Virus

SARS-CoV-2 and Neutralizing Antibodies

Immunological Synapse

RecA and DNA

SARS-CoV-2 Fusion

Biosites: Basement Membrane

Escherichia coli

Vascular Endothelial Growth Factor (VegF) Signaling

Biosites: Nucleus

Coronavirus Life Cycle

Abiogenesis

Coronavirus

Lipid Droplets

Biosites: Cytoplasm