Molecule of the Month
August 2026

Histone Ubiquitination and Deubiquitination Complexes

Enzymes that add and remove marks from chromosomes to keep gene regulation in balance

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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.

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Intermolecular Contacts in Hemoglobin S

DPG-Hemoglobin Complex

Immunoglobulin G (IgG)

Cytochrome c

Crambin

Transfer Ribonucleic Acid (tRNA)

Trypsin

Hemoglobin S

Induced Lac Repressor

A-DNA

Ribonuclease S

Deoxyribonucleic Acid (DNA)

Oxyhemoglobin

Z-DNA

Lysozyme (512)

Myoglobin

B-DNA

Tomato Bushy Stunt Virus (TBSV)

Myohemerythrin

DNA

Deoxyhemoglobin

Lac Repressor

Cytochrome c (unbound)

Hemoglobin

Collagen

Carboxypeptidase A

Lysozyme (488)

TATA-Binding Protein (TBP)

Aspartate Transcarbamoylase (ATCase)

Hemoglobin (1000)

Myoglobin Fold

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

Phage-based COVID-19 Vaccine

Red Blood Cell Cytoskeleton

RecA and DNA

Escherichia coli

Vascular Endothelial Growth Factor (VegF) Signaling

Biosites: Red Blood Cell

Insulin Action

Biosites: Muscle

CytoSkeleton

Caulobacter Polar Microdomain

Kinetochore

SARS-CoV-2 mRNA Vaccine

Casein Micelle and Fat Globule in Milk

Coronavirus Life Cycle

Respiratory Droplet

Immunological Synapse

JCVI-syn3A Minimal Cell

Excitatory and Inhibitory Synapses

Model of a Mycoplasma Cell

Bacteriophage T4 Infection

Autophagy

Influenza Virus

Coronavirus

Last Universal Common Ancestor

HIV in Blood Plasma

HIV Vaccine

Mycoplasma mycoides

Influenza Vaccine

Lipid Droplets

Myelin

SARS-CoV-2 and Neutralizing Antibodies

Transfer RNA and Gag Protein

Biosites: Nucleus

Escherichia coli Bacterium

Blood

Biosites: Basement Membrane

SARS-CoV-2 Fusion

Collagen and Extracellular Matrix

Chloroplast

Poliovirus Neutralization

Cellulose Synthase

Biosites: Cytoplasm

Measles Virus Proteins

Biosites: Blood Plasma

Abiogenesis

Myoglobin in a Whale Muscle Cell

Ebola Virus

Insulin Release

HIV-Infected Cell

Zika Virus