Description: sh-polypeptide-73 is a single chain synthetic human peptide, produced by fermentation in e. coli. the starting gene is a synthesized copy of the human gene which codes for macrophage colony stimulating factor 1 used as such or adapted to the production host. it contains a maximum of 554 amino acids which may contain disulfide bonds and/or glycosylation. the protein consists of the proper sequence of the 20 standard amino acids.