The chemical sequence "Z(OMe)-Glu(OBzl)-Ser-Asn-Gln-Glu(OBzl)-Arg(Mts)-Gly-Ala-OBzl" represents a peptide composed of ten amino acids. The sequence begins with Z(OMe), which is a protecting group for the N-terminus of the peptide, followed by a glutamic acid (Glu) with a benzyl ester (OBzl) protecting group. This is followed by serine (Ser), asparagine (Asn), and glutamine (Gln), with another glutamic acid (Glu) having a benzyl ester protecting group. The sequence continues with arginine (Arg) with a 4-methyltrityl (Mts) protecting group, glycine (Gly), and alanine (Ala), ending with a benzyl ester protecting group. This peptide is likely used in chemical synthesis or as a building block for larger biomolecules, with the protecting groups ensuring that the peptide链 maintains its structure during synthesis and can be selectively deprotected at the appropriate stages.
The CAS Registry Mumber 91475-07-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,4,7 and 5 respectively; the second part has 2 digits, 0 and 7 respectively. Calculate Digit Verification of CAS Registry Number 91475-07: (7*9)+(6*1)+(5*4)+(4*7)+(3*5)+(2*0)+(1*7)=139 139 % 10 = 9 So 91475-07-9 is a valid CAS Registry Number.