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.

Trypsin

Ribonuclease S

Aspartate Transcarbamoylase (ATCase)

Deoxyribonucleic Acid (DNA)

TATA-Binding Protein (TBP)

Crambin

Lac Repressor

Hemoglobin (1000)

Collagen

A-DNA

Transfer Ribonucleic Acid (tRNA)

Oxyhemoglobin

Immunoglobulin G (IgG)

Myoglobin

Tomato Bushy Stunt Virus (TBSV)

Intermolecular Contacts in Hemoglobin S

Hemoglobin

Hemoglobin S

Deoxyhemoglobin

Z-DNA

B-DNA

Cytochrome c (unbound)

Myoglobin Fold

Lysozyme (488)

Cytochrome c

Lysozyme (512)

Myohemerythrin

Carboxypeptidase A

Induced Lac Repressor

DNA

DPG-Hemoglobin Complex

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

Mycoplasma mycoides

Blood

Ebola Virus

SARS-CoV-2 mRNA Vaccine

Casein Micelle and Fat Globule in Milk

Cellulose Synthase

Abiogenesis

Zika Virus

CytoSkeleton

Vascular Endothelial Growth Factor (VegF) Signaling

Lipid Droplets

HIV in Blood Plasma

Coronavirus Life Cycle

Biosites: Muscle

Myoglobin in a Whale Muscle Cell

Measles Virus Proteins

Excitatory and Inhibitory Synapses

Respiratory Droplet

Last Universal Common Ancestor

Collagen and Extracellular Matrix

Insulin Action

Coronavirus

Biosites: Blood Plasma

SARS-CoV-2 Fusion

RecA and DNA

Transfer RNA and Gag Protein

Kinetochore

Bacteriophage T4 Infection

Insulin Release

Chloroplast

Immunological Synapse

Phage-based COVID-19 Vaccine

Caulobacter Polar Microdomain

Red Blood Cell Cytoskeleton

Model of a Mycoplasma Cell

Biosites: Cytoplasm

Escherichia coli

Biosites: Basement Membrane

Biosites: Red Blood Cell

HIV-Infected Cell

Influenza Virus

JCVI-syn3A Minimal Cell

Autophagy

Escherichia coli Bacterium

Myelin

Biosites: Nucleus

Poliovirus Neutralization

Influenza Vaccine

SARS-CoV-2 and Neutralizing Antibodies

HIV Vaccine