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106880-66-4

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106880-66-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 106880-66-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,6,8,8 and 0 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 106880-66:
(8*1)+(7*0)+(6*6)+(5*8)+(4*8)+(3*0)+(2*6)+(1*6)=134
134 % 10 = 4
So 106880-66-4 is a valid CAS Registry Number.

106880-66-4Relevant articles and documents

Synthesis of modified aldonic acids and studies of their substrate efficiency for dihydroxy acid dehydratase (DHAD)

Limberg, Gerrit,Thiem, Joachim

, p. 349 - 356 (2007/10/03)

Modified aldopentonic and aldohexonic acids were synthesized in order to study the electronic requirements for a successful enzymatic conversion into their corresponding 2-keto 3-deoxy analogues by dihydroxy acid dehydratase (DHAD), an enzyme from the biosynthetic pathway of branched chain amino acids. Analytical tests with the novel artificial substrates (18)-(21) and (27) provided evidence that the amount of conversion could be enhanced by replacement of the hydroxy group at C 4 of L-arabinonic acid (21) with less electron-withdrawing, ambivalent or electron-donating substituents. Modified aldohexonic acids were no substrates for DHAD, perhaps due to less perfect binding to the active site presumably for steric reasons. For 4-deoxy-L-threo-pentonic acid (18) the enzymatic conversion into 3,4-dideoxy-2-ketopentonic acid (29) by DHAD could be achieved on a preparative scale.

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