Custom gene synthesis is a solid component of the all-inclusive protein expression services offered by Creative Biolabs. Gene synthesis is a technology that produces double-stranded DNA molecules with specified sequences from dNTPs. Nowadays, many genes are physically available from commercial suppliers. However, there are a significant number of genes that exist only as digital sequences. Also, Biological and Pharmaceutical research require genes of man-made and predicted sequences that do not exist naturally. Custom gene design and assembly provide a unique approach to obtain these otherwise unavailable genes.