Molecule of the Month
January 2025

Assembly Line Polyketide Synthases

Large multienzyme complexes that synthesize diverse small molecules in a stepwise manner.

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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.

Cytochrome c

TATA-Binding Protein (TBP)

Hemoglobin (1000)

Crambin

DPG-Hemoglobin Complex

Lac Repressor

Z-DNA

Lysozyme (488)

Trypsin

Deoxyribonucleic Acid (DNA)

Myohemerythrin

Immunoglobulin G (IgG)

Induced Lac Repressor

A-DNA

Myoglobin Fold

Lysozyme (512)

Hemoglobin S

Tomato Bushy Stunt Virus (TBSV)

Cytochrome c (unbound)

Carboxypeptidase A

Ribonuclease S

Transfer Ribonucleic Acid (tRNA)

Aspartate Transcarbamoylase (ATCase)

Myoglobin

Intermolecular Contacts in Hemoglobin S

DNA

Oxyhemoglobin

Collagen

Hemoglobin

Deoxyhemoglobin

B-DNA

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

Lipid Droplets

Mycoplasma mycoides

Casein Micelle and Fat Globule in Milk

Biosites: Blood Plasma

SARS-CoV-2 and Neutralizing Antibodies

Biosites: Nucleus

SARS-CoV-2 mRNA Vaccine

RecA and DNA

Influenza Virus

Model of a Mycoplasma Cell

Last Universal Common Ancestor

SARS-CoV-2 Fusion

Measles Virus Proteins

Escherichia coli

Influenza Vaccine

Insulin Release

Autophagy

Coronavirus Life Cycle

Myoglobin in a Whale Muscle Cell

Collagen and Extracellular Matrix

Excitatory and Inhibitory Synapses

Blood

Biosites: Red Blood Cell

Biosites: Basement Membrane

Biosites: Muscle

HIV-Infected Cell

Escherichia coli Bacterium

Myelin

Immunological Synapse

Ebola Virus

Abiogenesis

Biosites: Cytoplasm

Coronavirus

Cellulose Synthase

HIV in Blood Plasma

Transfer RNA and Gag Protein

Poliovirus Neutralization

Bacteriophage T4 Infection

Red Blood Cell Cytoskeleton

Phage-based COVID-19 Vaccine

JCVI-syn3A Minimal Cell

Insulin Action

Kinetochore

Caulobacter Polar Microdomain

Respiratory Droplet

Chloroplast

HIV Vaccine

CytoSkeleton

Vascular Endothelial Growth Factor (VegF) Signaling

Zika Virus