Molecular Science Illustrations

Symmation offers accurate representations of molecular events and actions, by relying on scientific expertise, literature and data.

Viagra - Sildenafil citrate
Viagra - Sildenafil citrate

Viagra, an oral therapy for erectile dysfunction, is the citrate salt of sildenafil, a selective inhibitor of cyclic guanosine monophosphate (cGMP)-specific phosphodiesterase type 5 (PDE5). This image conveys the simple nature of an otherwise...

Serotonin Transporter (5-HT)
Serotonin Transporter (5-HT)

Findings suggest that the serotonin transporter (5-HT) might be linked to both neuroticism and sexual behaviour as well as to obsessive-compulsive disorder (OCD). Here is represented a conceptualized structure of the molecule based on scientific...

The Structure of Collagen
The Structure of Collagen

A collagenous fiber is a bundle of many macrofibrils. Each macrofibrilis in turn a bundle of numerous microfibrils. The microfibril is composed of many tropocollagen helices. Each of these assembled from three polypeptide chains twisted together....

Molecular Planetary Gear
Molecular Planetary Gear

Planetary gears convert shaft power from one angular frequency to another. This model of a nano-motor was derived from K. Eric Drexler book, Nanosystems: Molecular Machinery, Manufacturing, and Computation. We have developed in-house plugins to...

DNA Cleavage by Restriction Enzyme EcoRV
DNA Cleavage by Restriction Enzyme EcoRV

The restriction enzyme EcoR V is shown (colored in green and blue for each monomer in the homodimer). The DNA is colored in standard CPK colors and is shown as bound to the enzyme prior to cleavage. An animation of this process is currently in...

Fluid Mosaic Model of the Membrane Bilayer
Fluid Mosaic Model of the Membrane Bilayer

A simplified view of the Fluid Mosaic Model where only the lipid bilayer is shown. The lipid tails ( e.g. acyl, phytanyl, etc...) are the thin/long protrusions from the headgroup (the large spheroid moiety). The lipid bilayer is a thin polar...

Viagra and Phosphodiesterase 5 Complex
Viagra and Phosphodiesterase 5 Complex

Human phosphodiesterase 5 (PDE5) is the protein that viagra binds to and inhits. Viagra has no direct relaxant effect that leads to penile erection but it enhances the effect of nitric oxide (NO) by inhibiting PDE5. PDE5 is responsible for the...

Cover Image - Current Opinions in Structural Biology
Cover Image - Current Opinions in Structural...

One of our cover images, from our archives. The image was created for the journal Current Opinions in Structural Biology and displays the protein bacteriorhodopsin floating above a purple membrane sheet.

C-Reactive Protein
C-Reactive Protein

Researchers have recently reported that a protein produced by the body during inflammation is a bigger cause of heart disease than cholesterol. The research published in the New England Journal of Medecine found that inflammation in the body...

Molecular Animation of DNA - Information by Atoms
Molecular Animation of DNA - Information by Atoms

Molecular animation of the information molecule - deoxyribonucleic acid, or DNA for short. The two strands of DNA are shown slowly rotating within solution, and ions are shown floating by. DNA is composed of two strands of deoxyribonucleic...

Oxytocin - A Human Neuromodulator Hormone
Oxytocin - A Human Neuromodulator Hormone

Oxytocin is a mammalian neurohypophysial hormone that acts primarily as a neuromodulator in the brain. Oxytocin plays roles in sexual reproduction, in particular during and after childbirth. It is released in large amounts after distension of...

Type IV Collagen Auto-Antigen Targets
Type IV Collagen Auto-Antigen Targets

Tissue injury in Goodpasture (GP) syndrome (rapidly progressive glomerular nephritis and pulmonary hemorrhage) is mediated by antibasement membrane antibodies that are targeted to the alpha3(IV) chain of type IV collagen, one of five alpha(IV)...