Genscript.com coupons are promotional codes that can be used to get discounts on services offered by GenScript. These services include gene synthesis, peptide synthesis, protein expression and purification packages, and custom monoclonal and polyclonal antibody services. There are different types of coupons available. For example, there is a $100 Welcome Gift Coupon for new customers, which is valid for 3 months and cannot be combined with other discounts. There are also service promotions, such as 50% off for new customers until a certain date, a coupon worth up to $1000 for start-ups and new labs, and a 25% off for fast gene synthesis. Additionally, there is a referral program where you can invite a friend and both get $100. Please note that terms and conditions apply to these coupons. It's recommended to check the official website for the most accurate and up-to-date information.