Category: Peptide Information

Research Peptides

Research peptides are synthetic compounds manufactured exclusively for use in scientific investigation. They are not intended for human consumption and are sold strictly for laboratory research, in vitro testing, and preclinical studies. The scope of peptide research spans numerous fields including endocrinology, immunology, neuroscience, oncology, metabolic disease, tissue engineering, and anti-aging science. Peptides serve as […]

Peptides vs Proteins

While both peptides and proteins are composed of amino acids linked by peptide bonds, they differ in size, structure, and function. Peptides are generally defined as chains of fewer than 50 amino acids, while proteins contain 50 or more residues and typically fold into complex three-dimensional structures. Proteins rely on their tertiary and quaternary structures […]

Peptide Purification

After synthesis, crude peptide mixtures contain the desired product along with various impurities including truncated sequences, deletion peptides, and side-reaction products. Purification is essential to isolate the target peptide at the required purity level. Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC) is the gold standard for peptide purification. It separates molecules based on their hydrophobic interactions with […]

Peptide Solubility

Peptide solubility depends on the amino acid composition and the overall charge of the molecule. Hydrophilic peptides (those rich in charged or polar residues like Arg, Lys, Asp, Glu) are generally soluble in aqueous solutions, while hydrophobic peptides may require organic co-solvents. As a general rule, first attempt to dissolve the peptide in sterile water […]

Peptide Storage

Proper storage is critical to maintaining peptide integrity over time. Degradation can occur through hydrolysis, oxidation, aggregation, and other chemical processes, all of which are accelerated by heat, moisture, and light exposure. Lyophilized (freeze-dried) peptides should be stored at -20°C or lower in a sealed, desiccated container protected from light. Under these conditions, most peptides […]

Peptide Bonds

A peptide bond is a covalent chemical bond formed between two amino acid molecules when the carboxyl group of one amino acid reacts with the amino group of another, releasing a molecule of water in a condensation reaction. This amide bond (–CO–NH–) is the fundamental linkage that connects amino acids into peptide chains. The peptide […]

Peptide Synthesis

Peptide synthesis is the process of chemically assembling amino acids in a specific sequence to create a desired peptide. The two primary methods are Solid-Phase Peptide Synthesis (SPPS) and Solution-Phase Synthesis, with SPPS being the dominant method for research-grade peptides. In SPPS, the first amino acid is anchored to an insoluble resin bead. Subsequent amino […]

Peptide Purity

Peptide purity refers to the percentage of the desired peptide present in a sample relative to all other compounds. High purity is essential for reliable and reproducible research results, as impurities can interfere with biological assays and lead to misleading conclusions. At Research Labs, we maintain a strict ≥99% purity standard across our entire catalog. […]

Introduction to Peptides

Peptides are short chains of amino acids, typically consisting of 2 to 50 amino acid residues, linked together by peptide bonds. They are distinguished from proteins primarily by their shorter length, though the boundary between the two is not strictly defined. In the context of biological research, peptides serve as critical signaling molecules. They act […]