sh-Decapeptide-26 SP is a single chain human peptide produced synthetically to be identical to a portion of the protein, H/ACA Ribonucleoprotein Complex Subunit DKC1, and consists of arginine, glutamine, lysine, serine and tyrosine. The parent protein contains a maximum of 514 amino acids which may contain disulfide bonds and/or glycosylation, and consists of the proper sequence of the 20 standard amino acids.