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.

Lac Repressor

Carboxypeptidase A

Cytochrome c (unbound)

Hemoglobin (1000)

Trypsin

DNA

Lysozyme (512)

Tomato Bushy Stunt Virus (TBSV)

Cytochrome c

Immunoglobulin G (IgG)

Myoglobin Fold

Intermolecular Contacts in Hemoglobin S

Ribonuclease S

Oxyhemoglobin

Myohemerythrin

TATA-Binding Protein (TBP)

A-DNA

Hemoglobin S

Hemoglobin

Crambin

Transfer Ribonucleic Acid (tRNA)

Z-DNA

Collagen

DPG-Hemoglobin Complex

Deoxyribonucleic Acid (DNA)

Myoglobin

Deoxyhemoglobin

Induced Lac Repressor

B-DNA

Aspartate Transcarbamoylase (ATCase)

Lysozyme (488)

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

Insulin Release

Model of a Mycoplasma Cell

Biosites: Basement Membrane

Excitatory and Inhibitory Synapses

Myelin

Transfer RNA and Gag Protein

RecA and DNA

Chloroplast

Red Blood Cell Cytoskeleton

Vascular Endothelial Growth Factor (VegF) Signaling

SARS-CoV-2 mRNA Vaccine

Autophagy

Coronavirus

Immunological Synapse

Coronavirus Life Cycle

Influenza Vaccine

Myoglobin in a Whale Muscle Cell

Influenza Virus

Lipid Droplets

Mycoplasma mycoides

Biosites: Muscle

Measles Virus Proteins

Casein Micelle and Fat Globule in Milk

HIV in Blood Plasma

Phage-based COVID-19 Vaccine

CytoSkeleton

Biosites: Red Blood Cell

Poliovirus Neutralization

Biosites: Blood Plasma

HIV Vaccine

Bacteriophage T4 Infection

Abiogenesis

Last Universal Common Ancestor

Cellulose Synthase

Respiratory Droplet

Collagen and Extracellular Matrix

SARS-CoV-2 Fusion

SARS-CoV-2 and Neutralizing Antibodies

Kinetochore

Zika Virus

Caulobacter Polar Microdomain

Biosites: Cytoplasm

JCVI-syn3A Minimal Cell

Biosites: Nucleus

Escherichia coli

Escherichia coli Bacterium

HIV-Infected Cell

Blood

Ebola Virus

Insulin Action