Molecule of the Month
April 2026

Insect Odorant Receptors

Protein complexes that allow insects to detect a wide variety of volatile compounds

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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

Trypsin

Z-DNA

Cytochrome c

Hemoglobin

Aspartate Transcarbamoylase (ATCase)

Hemoglobin (1000)

Cytochrome c (unbound)

Myohemerythrin

Induced Lac Repressor

Lysozyme (488)

Lac Repressor

Crambin

DPG-Hemoglobin Complex

Oxyhemoglobin

Transfer Ribonucleic Acid (tRNA)

B-DNA

Myoglobin Fold

Carboxypeptidase A

Immunoglobulin G (IgG)

TATA-Binding Protein (TBP)

Deoxyhemoglobin

Deoxyribonucleic Acid (DNA)

Lysozyme (512)

Tomato Bushy Stunt Virus (TBSV)

Hemoglobin S

DNA

Collagen

A-DNA

Myoglobin

Ribonuclease 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

Insulin Release

SARS-CoV-2 mRNA Vaccine

Biosites: Nucleus

Kinetochore

Mycoplasma mycoides

Last Universal Common Ancestor

Coronavirus

Biosites: Cytoplasm

Excitatory and Inhibitory Synapses

Zika Virus

Biosites: Basement Membrane

Red Blood Cell Cytoskeleton

Cellulose Synthase

HIV Vaccine

SARS-CoV-2 Fusion

Lipid Droplets

Biosites: Blood Plasma

Respiratory Droplet

Vascular Endothelial Growth Factor (VegF) Signaling

Myelin

Collagen and Extracellular Matrix

HIV-Infected Cell

Blood

Phage-based COVID-19 Vaccine

Influenza Virus

Insulin Action

Escherichia coli Bacterium

Influenza Vaccine

Casein Micelle and Fat Globule in Milk

Transfer RNA and Gag Protein

Bacteriophage T4 Infection

Immunological Synapse

RecA and DNA

Myoglobin in a Whale Muscle Cell

Escherichia coli

HIV in Blood Plasma

JCVI-syn3A Minimal Cell

Model of a Mycoplasma Cell

Biosites: Red Blood Cell

CytoSkeleton

Caulobacter Polar Microdomain

SARS-CoV-2 and Neutralizing Antibodies

Ebola Virus

Poliovirus Neutralization

Abiogenesis

Chloroplast

Biosites: Muscle

Autophagy

Coronavirus Life Cycle

Measles Virus Proteins