Molecule of the Month
November 2026

Artificial Metalloenzymes

Engineering enzymes to catalyze reactions never seen in nature

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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.

Hemoglobin (1000)

Intermolecular Contacts in Hemoglobin S

Lac Repressor

Z-DNA

Myoglobin Fold

A-DNA

Induced Lac Repressor

Oxyhemoglobin

Lysozyme (488)

Myoglobin

DPG-Hemoglobin Complex

Collagen

Ribonuclease S

Cytochrome c

B-DNA

Myohemerythrin

Deoxyhemoglobin

TATA-Binding Protein (TBP)

Lysozyme (512)

Crambin

Deoxyribonucleic Acid (DNA)

Carboxypeptidase A

Tomato Bushy Stunt Virus (TBSV)

Hemoglobin

DNA

Cytochrome c (unbound)

Aspartate Transcarbamoylase (ATCase)

Transfer Ribonucleic Acid (tRNA)

Trypsin

Hemoglobin S

Immunoglobulin G (IgG)

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

CytoSkeleton

Phage-based COVID-19 Vaccine

HIV in Blood Plasma

Collagen and Extracellular Matrix

HIV Vaccine

RecA and DNA

Last Universal Common Ancestor

Vascular Endothelial Growth Factor (VegF) Signaling

Immunological Synapse

Lipid Droplets

Caulobacter Polar Microdomain

Kinetochore

Measles Virus Proteins

Red Blood Cell Cytoskeleton

Blood

Biosites: Muscle

Escherichia coli Bacterium

Autophagy

Poliovirus Neutralization

Influenza Vaccine

Biosites: Nucleus

Biosites: Blood Plasma

SARS-CoV-2 Fusion

Biosites: Red Blood Cell

Excitatory and Inhibitory Synapses

Abiogenesis

Bacteriophage T4 Infection

Myelin

Coronavirus Life Cycle

Myoglobin in a Whale Muscle Cell

SARS-CoV-2 mRNA Vaccine

Biosites: Basement Membrane

Influenza Virus

Casein Micelle and Fat Globule in Milk

JCVI-syn3A Minimal Cell

Transfer RNA and Gag Protein

Respiratory Droplet

Zika Virus

Insulin Release

Chloroplast

SARS-CoV-2 and Neutralizing Antibodies

Biosites: Cytoplasm

Ebola Virus

Mycoplasma mycoides

Model of a Mycoplasma Cell

HIV-Infected Cell

Insulin Action

Escherichia coli

Cellulose Synthase

Coronavirus