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.

Myohemerythrin

TATA-Binding Protein (TBP)

Lysozyme (512)

Carboxypeptidase A

Tomato Bushy Stunt Virus (TBSV)

Lac Repressor

Aspartate Transcarbamoylase (ATCase)

Myoglobin

Crambin

Hemoglobin S

Oxyhemoglobin

Transfer Ribonucleic Acid (tRNA)

Induced Lac Repressor

Z-DNA

Hemoglobin (1000)

Myoglobin Fold

DPG-Hemoglobin Complex

Immunoglobulin G (IgG)

Deoxyhemoglobin

Hemoglobin

Deoxyribonucleic Acid (DNA)

Cytochrome c

B-DNA

DNA

Trypsin

Lysozyme (488)

Intermolecular Contacts in Hemoglobin S

Ribonuclease S

A-DNA

Cytochrome c (unbound)

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

Vascular Endothelial Growth Factor (VegF) Signaling

Caulobacter Polar Microdomain

Blood

Autophagy

Insulin Release

Poliovirus Neutralization

Bacteriophage T4 Infection

Biosites: Basement Membrane

SARS-CoV-2 and Neutralizing Antibodies

Escherichia coli Bacterium

Excitatory and Inhibitory Synapses

Collagen and Extracellular Matrix

Mycoplasma mycoides

Last Universal Common Ancestor

Escherichia coli

Measles Virus Proteins

Influenza Virus

Biosites: Cytoplasm

Red Blood Cell Cytoskeleton

Influenza Vaccine

SARS-CoV-2 mRNA Vaccine

JCVI-syn3A Minimal Cell

Cellulose Synthase

Immunological Synapse

Biosites: Muscle

HIV in Blood Plasma

Respiratory Droplet

Chloroplast

CytoSkeleton

Biosites: Red Blood Cell

Myelin

Myoglobin in a Whale Muscle Cell

Zika Virus

Kinetochore

Transfer RNA and Gag Protein

Model of a Mycoplasma Cell

Biosites: Nucleus

Abiogenesis

Ebola Virus

Insulin Action

Lipid Droplets

HIV Vaccine

Casein Micelle and Fat Globule in Milk

Biosites: Blood Plasma

HIV-Infected Cell

Coronavirus

Phage-based COVID-19 Vaccine

SARS-CoV-2 Fusion

Coronavirus Life Cycle

RecA and DNA