The metabolic amino acid ornithine is a direct precursor of the polyamine putrescine, shown here.+HẠN–CH,CH,CH,CH, NH,+Subsequent reactions convert putrescine to spermine and spermidine.transaminationPutrescineWhat type of reaction is required to convert ornithineto putrescine?O dehydrationO methylationO decarboxylationWhat enzymatic cofactor is needed to convert ornithineto putrescine?O S-adenosylmethionineFeMoO tetrahydrofolateO pyridoxal phosphate

Ornithischians is a metabolically active non proteogenic amino acid so that it would not be…

Answered: The metabolic amino acid ornithine is a…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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. In a certain plant, the flower petals are normally purple.Two recessive mutations arise in separate plants and arefound to be on different chromosomes. Mutation 1 (m1)gives blue petals when homozygous (m1/m1). Mutation2 (m2) gives red petals when homozygous (m2/m2).Biochemists working on the synthesis of flower pigments in this species have already described the following pathway:colorless (white)compoundblue pigmentred pigmentenzyme Aenzyme Ba. Which mutant would you expect to be deficient inenzyme A activity?b. A plant has the genotype M1/m1 ; M2/m2. Whatwould you expect its phenotype to be?c. If the plant in part b is selfed, what colors of progenywould you expect and in what proportions?d. Why are these mutants recessive?
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