Molecule of the Month
February 2026

Histones Across the Tree of Life

Uncovering the evolutionary diversity of histones

More

3D View:  

Style

Color

Spin

Learn
PDB data help explain fundamental biology, biomedicine, bioengineering/biotechnology, and energy sciences
Feature Focus
Use PDB-101 resources to learn how researchers are using biology in industry
Teach
The RCSB PDB Curricula provide authentic, hands-on teaching materials, individual and group activities and assessment suggestions
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 (unbound)

Crambin

Hemoglobin

DNA

Induced Lac Repressor

Lysozyme (512)

Carboxypeptidase A

Z-DNA

A-DNA

Intermolecular Contacts in Hemoglobin S

Trypsin

Myoglobin

Hemoglobin (1000)

DPG-Hemoglobin Complex

Ribonuclease S

TATA-Binding Protein (TBP)

Hemoglobin S

Myoglobin Fold

Lac Repressor

Cytochrome c

Oxyhemoglobin

Immunoglobulin G (IgG)

Aspartate Transcarbamoylase (ATCase)

Lysozyme (488)

Transfer Ribonucleic Acid (tRNA)

Myohemerythrin

Collagen

B-DNA

Deoxyhemoglobin

Deoxyribonucleic Acid (DNA)

Tomato Bushy Stunt Virus (TBSV)

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

SARS-CoV-2 mRNA Vaccine

HIV in Blood Plasma

Insulin Action

Cellulose Synthase

Last Universal Common Ancestor

Poliovirus Neutralization

Mycoplasma mycoides

Autophagy

SARS-CoV-2 and Neutralizing Antibodies

Abiogenesis

Phage-based COVID-19 Vaccine

Transfer RNA and Gag Protein

Model of a Mycoplasma Cell

Respiratory Droplet

Escherichia coli

Biosites: Cytoplasm

HIV Vaccine

RecA and DNA

Coronavirus

Biosites: Blood Plasma

Lipid Droplets

Chloroplast

Blood

Biosites: Basement Membrane

Myoglobin in a Whale Muscle Cell

JCVI-syn3A Minimal Cell

Vascular Endothelial Growth Factor (VegF) Signaling

Biosites: Nucleus

CytoSkeleton

Influenza Vaccine

Biosites: Muscle

Kinetochore

Caulobacter Polar Microdomain

Escherichia coli Bacterium

Zika Virus

Ebola Virus

Collagen and Extracellular Matrix

Bacteriophage T4 Infection

Casein Micelle and Fat Globule in Milk

Measles Virus Proteins

SARS-CoV-2 Fusion

Insulin Release

Immunological Synapse

Coronavirus Life Cycle

HIV-Infected Cell

Excitatory and Inhibitory Synapses

Influenza Virus

Myelin

Red Blood Cell Cytoskeleton

Biosites: Red Blood Cell