"Z(OMe)-Ala-Arg(Mts)-Lys(Z)-Leu-OMe" is a peptide sequence consisting of five amino acids: Z(OMe)-protected alanine, arginine with an Mts protecting group, Z-protected lysine, leucine, and a final OMe group. This specific arrangement of amino acids is designed to have certain chemical properties and reactivity due to the protective groups attached to the side chains of some amino acids. The Z(OMe) group is a benzyloxycarbonyl (Cbz) derivative, which is commonly used to protect the α-amino group of alanine. The Mts group, or 4-methyltrityl group, is used to protect the guanidino group of arginine, while the Z group, another form of benzyloxycarbonyl protection, is used for the ε-amino group of lysine. The OMe group at the end of the sequence is a methoxy group, which can influence the peptide's solubility and reactivity. This particular sequence and the protective groups are chosen to facilitate specific chemical reactions or to stabilize the peptide during synthesis, purification, or other biological studies.
The CAS Registry Mumber 90709-73-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,7,0 and 9 respectively; the second part has 2 digits, 7 and 3 respectively. Calculate Digit Verification of CAS Registry Number 90709-73: (7*9)+(6*0)+(5*7)+(4*0)+(3*9)+(2*7)+(1*3)=142 142 % 10 = 2 So 90709-73-2 is a valid CAS Registry Number.