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.

Deoxyhemoglobin

Trypsin

DNA

Ribonuclease S

DPG-Hemoglobin Complex

Immunoglobulin G (IgG)

A-DNA

Deoxyribonucleic Acid (DNA)

B-DNA

Lysozyme (488)

Cytochrome c

Hemoglobin

Hemoglobin (1000)

Intermolecular Contacts in Hemoglobin S

Transfer Ribonucleic Acid (tRNA)

Lac Repressor

Aspartate Transcarbamoylase (ATCase)

Cytochrome c (unbound)

Myohemerythrin

Tomato Bushy Stunt Virus (TBSV)

Z-DNA

Myoglobin Fold

Crambin

Carboxypeptidase A

TATA-Binding Protein (TBP)

Lysozyme (512)

Induced Lac Repressor

Hemoglobin S

Oxyhemoglobin

Collagen

Myoglobin

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

Poliovirus Neutralization

Red Blood Cell Cytoskeleton

Last Universal Common Ancestor

Biosites: Cytoplasm

Collagen and Extracellular Matrix

SARS-CoV-2 Fusion

Mycoplasma mycoides

Insulin Release

Lipid Droplets

SARS-CoV-2 mRNA Vaccine

Biosites: Blood Plasma

Escherichia coli Bacterium

Influenza Vaccine

Excitatory and Inhibitory Synapses

Casein Micelle and Fat Globule in Milk

Immunological Synapse

Vascular Endothelial Growth Factor (VegF) Signaling

Phage-based COVID-19 Vaccine

Biosites: Red Blood Cell

Biosites: Basement Membrane

Coronavirus Life Cycle

Caulobacter Polar Microdomain

Model of a Mycoplasma Cell

HIV-Infected Cell

JCVI-syn3A Minimal Cell

Insulin Action

RecA and DNA

Biosites: Nucleus

Measles Virus Proteins

Kinetochore

Respiratory Droplet

Chloroplast

CytoSkeleton

Escherichia coli

Myelin

Cellulose Synthase

Ebola Virus

Autophagy

HIV Vaccine

Abiogenesis

Zika Virus

Myoglobin in a Whale Muscle Cell

Transfer RNA and Gag Protein

Influenza Virus

Blood

SARS-CoV-2 and Neutralizing Antibodies

Coronavirus

Biosites: Muscle

Bacteriophage T4 Infection

HIV in Blood Plasma