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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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.

Carboxypeptidase A

Myoglobin Fold

Tomato Bushy Stunt Virus (TBSV)

Myoglobin

Hemoglobin

Oxyhemoglobin

Deoxyribonucleic Acid (DNA)

Cytochrome c (unbound)

Hemoglobin S

Myohemerythrin

Induced Lac Repressor

Transfer Ribonucleic Acid (tRNA)

Collagen

Ribonuclease S

Lac Repressor

Z-DNA

Lysozyme (512)

Lysozyme (488)

Trypsin

DNA

A-DNA

Immunoglobulin G (IgG)

DPG-Hemoglobin Complex

Aspartate Transcarbamoylase (ATCase)

Intermolecular Contacts in Hemoglobin S

Hemoglobin (1000)

TATA-Binding Protein (TBP)

Crambin

Cytochrome c

B-DNA

Deoxyhemoglobin

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

Casein Micelle and Fat Globule in Milk

CytoSkeleton

Mycoplasma mycoides

JCVI-syn3A Minimal Cell

SARS-CoV-2 Fusion

Biosites: Cytoplasm

Lipid Droplets

Bacteriophage T4 Infection

Transfer RNA and Gag Protein

Poliovirus Neutralization

Biosites: Basement Membrane

Respiratory Droplet

Cellulose Synthase

Biosites: Red Blood Cell

Autophagy

HIV in Blood Plasma

Coronavirus

HIV Vaccine

Escherichia coli

Insulin Release

Influenza Virus

Caulobacter Polar Microdomain

Vascular Endothelial Growth Factor (VegF) Signaling

Biosites: Blood Plasma

Ebola Virus

Immunological Synapse

Biosites: Muscle

Excitatory and Inhibitory Synapses

SARS-CoV-2 mRNA Vaccine

SARS-CoV-2 and Neutralizing Antibodies

Zika Virus

Chloroplast

Coronavirus Life Cycle

Escherichia coli Bacterium

Model of a Mycoplasma Cell

Insulin Action

Last Universal Common Ancestor

Myoglobin in a Whale Muscle Cell

Abiogenesis

Phage-based COVID-19 Vaccine

HIV-Infected Cell

Measles Virus Proteins

Red Blood Cell Cytoskeleton

Collagen and Extracellular Matrix

Myelin

RecA and DNA

Biosites: Nucleus

Influenza Vaccine

Kinetochore

Blood