Hydrophilic vs Hydrophobic Peptides
Hydrophilic vs hydrophobic peptides: water-loving vs water-fearing, what decides it, and why it affects solubility and handling.
Blog
Liquid-Phase vs Solid-Phase Synthesis
Liquid-phase vs solid-phase peptide synthesis: the two ways peptides are built, and why solid-phase (SPPS) became the standard.
Cyclic vs Linear Peptides
Cyclic vs linear peptides: open chains vs closed rings, and how shape affects stability. A plain-English comparison.
Agonist vs Antagonist
Agonist vs antagonist: one activates a receptor, the other blocks it. The simple distinction, with examples from peptide research.
Disulfide Bonds in Peptides
Disulfide bonds in peptides: the cysteine 'bridges' that lock a peptide into a stable shape, and how they differ from peptide bonds.
Net Peptide Content vs HPLC Purity
Net peptide content vs HPLC purity: two different numbers on a spec sheet, and what each tells you about how much peptide is in the vial.
Sterile Filtration of Peptides
Sterile filtration of peptides: how a 0.22 micron filter removes microbes and particles, and what it does and doesn't remove.
TFA vs Acetate: Peptide Salt Forms
TFA vs acetate peptide salts: why research peptides come as salts, how the two forms differ, and when a TFA-free form is preferred.
Peptide Aggregation Explained
Peptide aggregation: why peptide molecules clump together, the warning signs, and how to reduce the risk in the lab.