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.

Myoglobin

Carboxypeptidase A

Myohemerythrin

Induced Lac Repressor

Intermolecular Contacts in Hemoglobin S

Myoglobin Fold

Collagen

Hemoglobin S

Lysozyme (488)

Lac Repressor

Hemoglobin (1000)

B-DNA

Deoxyhemoglobin

A-DNA

Deoxyribonucleic Acid (DNA)

Z-DNA

Ribonuclease S

Tomato Bushy Stunt Virus (TBSV)

Trypsin

DPG-Hemoglobin Complex

Transfer Ribonucleic Acid (tRNA)

Oxyhemoglobin

Immunoglobulin G (IgG)

DNA

Aspartate Transcarbamoylase (ATCase)

Cytochrome c (unbound)

Cytochrome c

Lysozyme (512)

TATA-Binding Protein (TBP)

Crambin

Hemoglobin

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

Immunological Synapse

Myoglobin in a Whale Muscle Cell

Collagen and Extracellular Matrix

Red Blood Cell Cytoskeleton

Mycoplasma mycoides

Biosites: Nucleus

Phage-based COVID-19 Vaccine

Insulin Release

Escherichia coli

Vascular Endothelial Growth Factor (VegF) Signaling

JCVI-syn3A Minimal Cell

Bacteriophage T4 Infection

HIV Vaccine

Escherichia coli Bacterium

Lipid Droplets

Poliovirus Neutralization

Influenza Vaccine

HIV-Infected Cell

Measles Virus Proteins

CytoSkeleton

Zika Virus

Caulobacter Polar Microdomain

Influenza Virus

Biosites: Basement Membrane

Chloroplast

SARS-CoV-2 and Neutralizing Antibodies

Casein Micelle and Fat Globule in Milk

Coronavirus Life Cycle

HIV in Blood Plasma

Cellulose Synthase

Ebola Virus

Abiogenesis

Biosites: Muscle

Excitatory and Inhibitory Synapses

Last Universal Common Ancestor

Biosites: Cytoplasm

SARS-CoV-2 Fusion

SARS-CoV-2 mRNA Vaccine

Transfer RNA and Gag Protein

Respiratory Droplet

Biosites: Red Blood Cell

Myelin

Blood

Insulin Action

RecA and DNA

Autophagy

Coronavirus

Kinetochore

Biosites: Blood Plasma

Model of a Mycoplasma Cell