The chemical sequence "Z(OMe)-Asp(OChp)-Tyr-Ser-Ile-Ala-Met(O)-NHNH-Troc" represents a peptide with a specific structure and functional groups. The peptide is composed of seven amino acids, each with unique side chains that contribute to its overall properties. The sequence begins with a Z(OMe) group, which is a protecting group for the N-terminus, followed by Asp(OChp), a derivative of aspartic acid with a chlorophenyl protecting group on the side chain. Tyrosine (Tyr), serine (Ser), isoleucine (Ile), alanine (Ala), and methionine (Met(O)) with an oxygen atom on the side chain are the subsequent amino acids. The peptide ends with an NHNH-Troc group, which includes a terminal amine and a Troc protecting group. This sequence is likely to be used in peptide synthesis, where the protecting groups are crucial for controlling the reactivity of specific functional groups during the synthesis process, ensuring the correct formation of peptide bonds and the final structure of the peptide.
The CAS Registry Mumber 99940-85-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,9,4 and 0 respectively; the second part has 2 digits, 8 and 5 respectively. Calculate Digit Verification of CAS Registry Number 99940-85: (7*9)+(6*9)+(5*9)+(4*4)+(3*0)+(2*8)+(1*5)=199 199 % 10 = 9 So 99940-85-9 is a valid CAS Registry Number.