Molecule of the Month
March 2025

Enoyl-CoA Carboxylases/Reductases

Enzymes that can quickly and efficiently fix carbon

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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.

Ribonuclease S

Z-DNA

Transfer Ribonucleic Acid (tRNA)

A-DNA

Tomato Bushy Stunt Virus (TBSV)

Lac Repressor

Cytochrome c (unbound)

Immunoglobulin G (IgG)

Myoglobin

DNA

Deoxyhemoglobin

Aspartate Transcarbamoylase (ATCase)

Trypsin

DPG-Hemoglobin Complex

Crambin

Lysozyme (512)

Hemoglobin

Oxyhemoglobin

Intermolecular Contacts in Hemoglobin S

Hemoglobin (1000)

B-DNA

Carboxypeptidase A

Myoglobin Fold

Hemoglobin S

Collagen

TATA-Binding Protein (TBP)

Deoxyribonucleic Acid (DNA)

Myohemerythrin

Induced Lac Repressor

Cytochrome c

Lysozyme (488)

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

Measles Virus Proteins

Immunological Synapse

Cellulose Synthase

RecA and DNA

Influenza Virus

Vascular Endothelial Growth Factor (VegF) Signaling

Zika Virus

Caulobacter Polar Microdomain

Biosites: Nucleus

Influenza Vaccine

SARS-CoV-2 and Neutralizing Antibodies

Myoglobin in a Whale Muscle Cell

Transfer RNA and Gag Protein

Phage-based COVID-19 Vaccine

Biosites: Cytoplasm

Biosites: Basement Membrane

JCVI-syn3A Minimal Cell

Ebola Virus

Myelin

Collagen and Extracellular Matrix

Last Universal Common Ancestor

HIV-Infected Cell

Casein Micelle and Fat Globule in Milk

Biosites: Muscle

Biosites: Blood Plasma

Chloroplast

Insulin Action

Insulin Release

Poliovirus Neutralization

SARS-CoV-2 Fusion

Mycoplasma mycoides

Biosites: Red Blood Cell

Blood

Coronavirus

Lipid Droplets

Autophagy

SARS-CoV-2 mRNA Vaccine

Respiratory Droplet

Model of a Mycoplasma Cell

Abiogenesis

CytoSkeleton

Kinetochore

Excitatory and Inhibitory Synapses

Escherichia coli

HIV in Blood Plasma

Escherichia coli Bacterium

HIV Vaccine

Bacteriophage T4 Infection

Coronavirus Life Cycle

Red Blood Cell Cytoskeleton