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.

A-DNA

B-DNA

Transfer Ribonucleic Acid (tRNA)

Cytochrome c

DPG-Hemoglobin Complex

Collagen

TATA-Binding Protein (TBP)

Aspartate Transcarbamoylase (ATCase)

Immunoglobulin G (IgG)

Hemoglobin

Hemoglobin (1000)

Carboxypeptidase A

Induced Lac Repressor

Trypsin

Deoxyhemoglobin

Lac Repressor

Lysozyme (512)

Intermolecular Contacts in Hemoglobin S

Myoglobin

Tomato Bushy Stunt Virus (TBSV)

Myoglobin Fold

Crambin

Lysozyme (488)

Myohemerythrin

Cytochrome c (unbound)

Oxyhemoglobin

Deoxyribonucleic Acid (DNA)

DNA

Ribonuclease S

Z-DNA

Hemoglobin 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

Respiratory Droplet

Myoglobin in a Whale Muscle Cell

Biosites: Basement Membrane

Kinetochore

Collagen and Extracellular Matrix

RecA and DNA

Lipid Droplets

HIV Vaccine

Phage-based COVID-19 Vaccine

Biosites: Nucleus

Influenza Virus

Chloroplast

Vascular Endothelial Growth Factor (VegF) Signaling

Myelin

HIV-Infected Cell

Immunological Synapse

Biosites: Blood Plasma

Coronavirus

Biosites: Cytoplasm

Transfer RNA and Gag Protein

Insulin Action

Bacteriophage T4 Infection

Poliovirus Neutralization

Excitatory and Inhibitory Synapses

Insulin Release

Casein Micelle and Fat Globule in Milk

Last Universal Common Ancestor

SARS-CoV-2 mRNA Vaccine

Caulobacter Polar Microdomain

Cellulose Synthase

Mycoplasma mycoides

Influenza Vaccine

SARS-CoV-2 Fusion

Blood

Autophagy

Escherichia coli

Biosites: Muscle

Ebola Virus

HIV in Blood Plasma

Model of a Mycoplasma Cell

Escherichia coli Bacterium

Abiogenesis

JCVI-syn3A Minimal Cell

Biosites: Red Blood Cell

SARS-CoV-2 and Neutralizing Antibodies

Red Blood Cell Cytoskeleton

Coronavirus Life Cycle

Zika Virus

Measles Virus Proteins

CytoSkeleton