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.

Lysozyme (488)

Myohemerythrin

Hemoglobin (1000)

Lysozyme (512)

Hemoglobin

Induced Lac Repressor

DPG-Hemoglobin Complex

Carboxypeptidase A

Immunoglobulin G (IgG)

Deoxyribonucleic Acid (DNA)

TATA-Binding Protein (TBP)

Myoglobin Fold

DNA

Ribonuclease S

Cytochrome c

Intermolecular Contacts in Hemoglobin S

Collagen

Trypsin

Oxyhemoglobin

Crambin

Myoglobin

Deoxyhemoglobin

Tomato Bushy Stunt Virus (TBSV)

Aspartate Transcarbamoylase (ATCase)

A-DNA

Z-DNA

Lac Repressor

Cytochrome c (unbound)

B-DNA

Transfer Ribonucleic Acid (tRNA)

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

Zika Virus

Biosites: Muscle

Biosites: Nucleus

Bacteriophage T4 Infection

Biosites: Blood Plasma

Poliovirus Neutralization

Phage-based COVID-19 Vaccine

Transfer RNA and Gag Protein

Biosites: Basement Membrane

Respiratory Droplet

HIV Vaccine

Immunological Synapse

Coronavirus

SARS-CoV-2 mRNA Vaccine

Blood

Red Blood Cell Cytoskeleton

Insulin Release

Caulobacter Polar Microdomain

Escherichia coli Bacterium

Influenza Vaccine

Autophagy

SARS-CoV-2 and Neutralizing Antibodies

Model of a Mycoplasma Cell

Lipid Droplets

HIV-Infected Cell

CytoSkeleton

Kinetochore

Mycoplasma mycoides

Biosites: Cytoplasm

Coronavirus Life Cycle

Cellulose Synthase

Chloroplast

Last Universal Common Ancestor

Biosites: Red Blood Cell

Casein Micelle and Fat Globule in Milk

Ebola Virus

HIV in Blood Plasma

Escherichia coli

JCVI-syn3A Minimal Cell

Influenza Virus

Abiogenesis

SARS-CoV-2 Fusion

Excitatory and Inhibitory Synapses

RecA and DNA

Myoglobin in a Whale Muscle Cell

Insulin Action

Measles Virus Proteins

Vascular Endothelial Growth Factor (VegF) Signaling

Collagen and Extracellular Matrix

Myelin