Molecule of the Month
September 2026

Biofilms

Bacterial communities glued together and protected by biological polymers

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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.

Intermolecular Contacts in Hemoglobin S

Oxyhemoglobin

Hemoglobin (1000)

Immunoglobulin G (IgG)

Induced Lac Repressor

Z-DNA

DPG-Hemoglobin Complex

Crambin

Hemoglobin

Cytochrome c (unbound)

Tomato Bushy Stunt Virus (TBSV)

Lysozyme (512)

Cytochrome c

Ribonuclease S

Myoglobin

Lysozyme (488)

Transfer Ribonucleic Acid (tRNA)

Myoglobin Fold

A-DNA

Aspartate Transcarbamoylase (ATCase)

Deoxyhemoglobin

Lac Repressor

Hemoglobin S

TATA-Binding Protein (TBP)

Trypsin

Myohemerythrin

DNA

Deoxyribonucleic Acid (DNA)

B-DNA

Carboxypeptidase A

Collagen

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

Kinetochore

Measles Virus Proteins

Casein Micelle and Fat Globule in Milk

Mycoplasma mycoides

CytoSkeleton

Myelin

Cellulose Synthase

SARS-CoV-2 and Neutralizing Antibodies

JCVI-syn3A Minimal Cell

Last Universal Common Ancestor

RecA and DNA

Biosites: Basement Membrane

Influenza Virus

Transfer RNA and Gag Protein

Biosites: Cytoplasm

Immunological Synapse

Autophagy

Influenza Vaccine

Biosites: Blood Plasma

Caulobacter Polar Microdomain

Biosites: Red Blood Cell

HIV-Infected Cell

Excitatory and Inhibitory Synapses

Escherichia coli Bacterium

Abiogenesis

Insulin Action

Lipid Droplets

Myoglobin in a Whale Muscle Cell

Model of a Mycoplasma Cell

Ebola Virus

Insulin Release

Zika Virus

Vascular Endothelial Growth Factor (VegF) Signaling

Respiratory Droplet

Poliovirus Neutralization

Coronavirus

SARS-CoV-2 mRNA Vaccine

Biosites: Nucleus

Blood

Phage-based COVID-19 Vaccine

Coronavirus Life Cycle

Collagen and Extracellular Matrix

Bacteriophage T4 Infection

HIV Vaccine

Red Blood Cell Cytoskeleton

HIV in Blood Plasma

SARS-CoV-2 Fusion

Escherichia coli

Biosites: Muscle

Chloroplast