The chemical sequence "Z-Asn-Thr-Pro-Ile-Leu-Pro-Gln-Ser-Leu-Pro-OBut" represents a peptide, which is a short chain of amino acids. In this specific peptide, the amino acids are linked together in the following order: Asparagine (Asn), Threonine (Thr), Proline (Pro), Isoleucine (Ile), Leucine (Leu), Proline (Pro), Glutamine (Gln), Serine (Ser), Leucine (Leu), and Proline (Pro). The "Z" group is a protecting group, often used in peptide synthesis to prevent unwanted side reactions. The "OBut" at the end indicates that the peptide is capped with a tert-butyloxycarbonyl group, which is another protecting group used to prevent the peptide from further reacting at the carboxyl end. This peptide sequence is of interest in biochemistry and pharmaceuticals, as it may have specific biological activities or be a component of larger protein structures.
The CAS Registry Mumber 75893-46-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,5,8,9 and 3 respectively; the second part has 2 digits, 4 and 6 respectively. Calculate Digit Verification of CAS Registry Number 75893-46: (7*7)+(6*5)+(5*8)+(4*9)+(3*3)+(2*4)+(1*6)=178 178 % 10 = 8 So 75893-46-8 is a valid CAS Registry Number.