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.

Images used with permission from the Howard Hughes Medical Institute (www.hhmi.org). All rights reserved.

Aspartate Transcarbamoylase (ATCase)

Deoxyribonucleic Acid (DNA)

Crambin

Immunoglobulin G (IgG)

Cytochrome c (unbound)

Lysozyme (512)

Hemoglobin S

Tomato Bushy Stunt Virus (TBSV)

Deoxyhemoglobin

DPG-Hemoglobin Complex

Ribonuclease S

Collagen

Lysozyme (488)

Myoglobin Fold

Intermolecular Contacts in Hemoglobin S

Hemoglobin (1000)

Z-DNA

Myohemerythrin

Oxyhemoglobin

B-DNA

Induced Lac Repressor

Hemoglobin

Transfer Ribonucleic Acid (tRNA)

Trypsin

DNA

Myoglobin

Carboxypeptidase A

TATA-Binding Protein (TBP)

A-DNA

Cytochrome c

Lac Repressor

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

Excitatory and Inhibitory Synapses

Autophagy

Insulin Action

Escherichia coli

HIV in Blood Plasma

JCVI-syn3A Minimal Cell

SARS-CoV-2 Fusion

Abiogenesis

Last Universal Common Ancestor

Chloroplast

Phage-based COVID-19 Vaccine

Vascular Endothelial Growth Factor (VegF) Signaling

Cellulose Synthase

Measles Virus Proteins

Myelin

Ebola Virus

Respiratory Droplet

HIV Vaccine

Coronavirus Life Cycle

Coronavirus

Escherichia coli Bacterium

Biosites: Red Blood Cell

Model of a Mycoplasma Cell

Bacteriophage T4 Infection

Insulin Release

Biosites: Blood Plasma

Myoglobin in a Whale Muscle Cell

HIV-Infected Cell

Mycoplasma mycoides

Blood

CytoSkeleton

Immunological Synapse

Influenza Virus

Caulobacter Polar Microdomain

Collagen and Extracellular Matrix

Lipid Droplets

Zika Virus

Poliovirus Neutralization

Influenza Vaccine

Biosites: Muscle

Casein Micelle and Fat Globule in Milk

Biosites: Nucleus

Biosites: Cytoplasm

Transfer RNA and Gag Protein

RecA and DNA

Kinetochore

SARS-CoV-2 and Neutralizing Antibodies

Red Blood Cell Cytoskeleton

SARS-CoV-2 mRNA Vaccine

Biosites: Basement Membrane