Catalog peptides are published, commercially obtainable sequences. Frequently manufactured in bulk at purity levels above 95%, commonly used catalog peptides are typically maintained on hand. Due to the bulk manufacturing method, producing these peptides in greater quantities enables businesses to sell them at reduced prices. On the other hand, custom peptides are not in the public domain. For this reason, some alterations or adjustments to catalog peptides must be ordered as a custom order. Purity requirements and sequence length are the two main deciding factors when ordering a bespoke peptide. A bespoke peptide is typically produced at CPC over the course of two to three weeks.