The purification process should be simple and have as few steps as possible to achieve purity. You can still get your targeted results even with two or more purification processes done right after another. One example is when ion exchange chromatography is used in alliance with reverse-phase chromatography.
Long-term peptide storage over several months and years demands proper refrigeration. The preferred and usual temperature for storage is -80C (-112F). Freezing peptides is optimal to preserve their stability and retain functional viability.
Solution Phase Synthesis (SPS) was the original approach to peptide synthesis. Though this process still has merit in this modern age, for large-scale peptide production, Solid-Phase Peptide Synthesis (SPPS) has become to be the method of choice of most scientists.
When two amino acids form a covalent bond, it creates a peptide bond.[1] The Carboxyl group of one amino acid may react with the second amino group of the other amino acid.