Is sh-Polypeptide-105 natural?

E. coli carrying a synthesised copy of the human Growth-Regulated Alpha Protein gene is grown in a fermenter on sugar and ammonium-salt media, then the protein is purified. Other expression hosts would not change the value.

A human signalling protein (growth-regulated alpha protein) produced by E. coli bacteria grown in a fermenter, using a copy of the human gene. CosIng reports no specific cosmetic function for it. It is built entirely from the 20 standard amino acids.

CosIng definition: sh-Polypeptide-105 is a single chain recombinant human peptide, produced by fermentation in E. coli. The starting gene is a synthesized copy of the human gene which codes for Growth-Regulated Alpha Protein, used as such or adapted to the production host. It contains a maximum of 107 amino acids which may contain disulfide bonds and/or glycosylation. The protein consists of the proper sequence of the 20 standard amino acids.