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.

B-DNA

Tomato Bushy Stunt Virus (TBSV)

Myoglobin Fold

Deoxyribonucleic Acid (DNA)

Trypsin

DPG-Hemoglobin Complex

Intermolecular Contacts in Hemoglobin S

Cytochrome c

Immunoglobulin G (IgG)

Lysozyme (488)

Lysozyme (512)

A-DNA

Oxyhemoglobin

Myohemerythrin

Myoglobin

Aspartate Transcarbamoylase (ATCase)

Hemoglobin S

Induced Lac Repressor

Z-DNA

Crambin

Collagen

DNA

Cytochrome c (unbound)

Carboxypeptidase A

Transfer Ribonucleic Acid (tRNA)

Hemoglobin (1000)

Hemoglobin

Lac Repressor

Deoxyhemoglobin

TATA-Binding Protein (TBP)

Ribonuclease S

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

HIV Vaccine

Myelin

Kinetochore

Measles Virus Proteins

Biosites: Cytoplasm

Insulin Release

Escherichia coli

Insulin Action

Biosites: Nucleus

Influenza Virus

Cellulose Synthase

Biosites: Blood Plasma

Bacteriophage T4 Infection

Coronavirus Life Cycle

Respiratory Droplet

Chloroplast

Casein Micelle and Fat Globule in Milk

Blood

Red Blood Cell Cytoskeleton

Biosites: Red Blood Cell

Last Universal Common Ancestor

Biosites: Muscle

Abiogenesis

SARS-CoV-2 mRNA Vaccine

SARS-CoV-2 Fusion

Immunological Synapse

Vascular Endothelial Growth Factor (VegF) Signaling

HIV-Infected Cell

Lipid Droplets

Poliovirus Neutralization

Mycoplasma mycoides

Escherichia coli Bacterium

Coronavirus

Model of a Mycoplasma Cell

Phage-based COVID-19 Vaccine

Collagen and Extracellular Matrix

JCVI-syn3A Minimal Cell

Influenza Vaccine

Excitatory and Inhibitory Synapses

HIV in Blood Plasma

RecA and DNA

Biosites: Basement Membrane

SARS-CoV-2 and Neutralizing Antibodies

Ebola Virus

CytoSkeleton

Caulobacter Polar Microdomain

Transfer RNA and Gag Protein

Autophagy

Myoglobin in a Whale Muscle Cell

Zika Virus