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.

Hemoglobin

Deoxyhemoglobin

Ribonuclease S

Aspartate Transcarbamoylase (ATCase)

Lysozyme (512)

Intermolecular Contacts in Hemoglobin S

Deoxyribonucleic Acid (DNA)

Cytochrome c (unbound)

Oxyhemoglobin

TATA-Binding Protein (TBP)

DPG-Hemoglobin Complex

DNA

Immunoglobulin G (IgG)

Myoglobin

B-DNA

Cytochrome c

Induced Lac Repressor

Hemoglobin (1000)

Crambin

Tomato Bushy Stunt Virus (TBSV)

Z-DNA

Myohemerythrin

Trypsin

Lac Repressor

Carboxypeptidase A

Collagen

Hemoglobin S

Myoglobin Fold

Lysozyme (488)

A-DNA

Transfer Ribonucleic Acid (tRNA)

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

Myoglobin in a Whale Muscle Cell

Biosites: Muscle

Coronavirus

Last Universal Common Ancestor

Myelin

Excitatory and Inhibitory Synapses

Abiogenesis

Collagen and Extracellular Matrix

Blood

Caulobacter Polar Microdomain

Biosites: Blood Plasma

Immunological Synapse

Escherichia coli Bacterium

Cellulose Synthase

SARS-CoV-2 and Neutralizing Antibodies

Vascular Endothelial Growth Factor (VegF) Signaling

Mycoplasma mycoides

Kinetochore

SARS-CoV-2 Fusion

Model of a Mycoplasma Cell

RecA and DNA

Biosites: Nucleus

HIV-Infected Cell

SARS-CoV-2 mRNA Vaccine

HIV Vaccine

Phage-based COVID-19 Vaccine

Respiratory Droplet

Red Blood Cell Cytoskeleton

Lipid Droplets

Casein Micelle and Fat Globule in Milk

Biosites: Basement Membrane

Chloroplast

Biosites: Red Blood Cell

Influenza Virus

Autophagy

Insulin Action

Ebola Virus

CytoSkeleton

Transfer RNA and Gag Protein

Biosites: Cytoplasm

Escherichia coli

Measles Virus Proteins

Coronavirus Life Cycle

Poliovirus Neutralization

HIV in Blood Plasma

JCVI-syn3A Minimal Cell

Influenza Vaccine

Zika Virus

Bacteriophage T4 Infection

Insulin Release