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77112-05-1

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77112-05-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77112-05-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,1,1 and 2 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 77112-05:
(7*7)+(6*7)+(5*1)+(4*1)+(3*2)+(2*0)+(1*5)=111
111 % 10 = 1
So 77112-05-1 is a valid CAS Registry Number.

77112-05-1Relevant articles and documents

An Approach to the Elucidation of Metabolic Breakdown Products of the Luteinizing Hormone-Releasing Hormone

Stetler-Stevenson, Mary Alice,Yang, Dai Chang,Lipkowski, Andrew,McCartney, Linda,Peterson, Darryl,Fluoret, George

, p. 688 - 692 (2007/10/02)

Metabolic breakdown of the luteinizing hormone-releasing hormone (LH-RH) could lead to the following fragments containing pyroglutamic acid: pyroglutamic acid (1), pGlu-His (2), pGlu-His-Trp (3), pGlu-His-Trp-Ser (4), etc., and finally pGlu-His-Trp-Ser-Tyr-Gly-Leu-Arg-Pro-Gly (10).We have synthesized fragments 2-10 and successfully separated all ten metabolites and LH-RH by high-performance liquid chromatography (HPLC) with μBondapak C18 column.In a test of viability of the method, cochromatography of fragments 1-10 and LH-RH with the products of chymotryptic digestion of tritiated LH-RH showed radioactive peaks corresponding to the expected products, fragments 3 and 5.Analysis of the products of incubation of a rat kidney homogenate supernatant with LH-RH showed fragments 1-4 and LH-RH.The finding of breakdown at position 4 uncovers a new site of LH-RH breakdown and points the way to the design of potential LH-RH antagonists and agonists where the 4 position would be substituted with unnatural amino acids to prevent breakdown.

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