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A synthetic pathway and associated diseases Dietary protein Phenylalanine (Phe) If (Phe] high Phe hydroxylase PKU Phenylpyruvic acid Albinism Cretinism Tyrosine (Tyr) Melanin Thyroxine Tyr aminotransferase Hydraxyphenylpyruvic acid (НРА) HPA oxídase Tyrosinosis Homogentisic acid (НА) HA oxidase Alkaptonuria Maleylacetoacetic acid co, + H,0 FIGURE 6-11 A section of the phenylalanine metabolic pathway in humans, including diseases associated with enzyme blockages. The disease PKU is produced when the enzyme phenylalanine hydroxylase malfunctions. Accumulation of phenylalanine results in an increase in phenylpyruvic acid, which interferes with the development of the nervous system. discovered through a standard ing response (most were steri approaches in the next section pheromone (hormone) releas» binds to a membrane receptor brane and activates the proteir sequential protein phosphoryl. cade activates the transcriptio: cell to mate. A mutation at

A synthetic pathway and associated diseases Dietary protein Phenylalanine (Phe) If (Phe] high Phe hydroxylase PKU Phenylpyruvic acid Albinism Cretinism Tyrosine (Tyr) Melanin Thyroxine Tyr aminotransferase Hydraxyphenylpyruvic acid (НРА) HPA oxídase Tyrosinosis Homogentisic acid (НА) HA oxidase Alkaptonuria Maleylacetoacetic acid co, + H,0 FIGURE 6-11 A section of the phenylalanine metabolic pathway in humans, including diseases associated with enzyme blockages. The disease PKU is produced when the enzyme phenylalanine hydroxylase malfunctions. Accumulation of phenylalanine results in an increase in phenylpyruvic acid, which interferes with the development of the nervous system. discovered through a standard ing response (most were steri approaches in the next section pheromone (hormone) releas» binds to a membrane receptor brane and activates the proteir sequential protein phosphoryl. cade activates the transcriptio: cell to mate. A mutation at

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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. In Figure 6-11,
a. in view of the position of HPA oxidase earlier in the
pathway compared to that of HA oxidase, would you
expect people with tyrosinosis to show symptoms of
alkaptonuria?
b. if a double mutant could be found, would you expect
tyrosinosis to be epistatic to alkaptonuria?

A synthetic pathway and associated diseases Dietary protein Phenylalanine (Phe) If (Phe] high Phe hydroxylase PKU Phenylpyruvic acid Albinism Cretinism Tyrosine (Tyr) Melanin Thyroxine Tyr aminotransferase Hydraxyphenylpyruvic acid (НРА) HPA oxídase Tyrosinosis Homogentisic acid (НА) HA oxidase Alkaptonuria Maleylacetoacetic acid co, + H,0 FIGURE 6-11 A section of the phenylalanine metabolic pathway in humans, including diseases associated with enzyme blockages. The disease PKU is produced when the enzyme phenylalanine hydroxylase malfunctions. Accumulation of phenylalanine results in an increase in phenylpyruvic acid, which interferes with the development of the nervous system. discovered through a standard ing response (most were steri approaches in the next section pheromone (hormone) releas» binds to a membrane receptor brane and activates the proteir sequential protein phosphoryl. cade activates the transcriptio: cell to mate. A mutation at
Transcribed Image Text:A synthetic pathway and associated diseases Dietary protein Phenylalanine (Phe) If (Phe] high Phe hydroxylase PKU Phenylpyruvic acid Albinism Cretinism Tyrosine (Tyr) Melanin Thyroxine Tyr aminotransferase Hydraxyphenylpyruvic acid (НРА) HPA oxídase Tyrosinosis Homogentisic acid (НА) HA oxidase Alkaptonuria Maleylacetoacetic acid co, + H,0 FIGURE 6-11 A section of the phenylalanine metabolic pathway in humans, including diseases associated with enzyme blockages. The disease PKU is produced when the enzyme phenylalanine hydroxylase malfunctions. Accumulation of phenylalanine results in an increase in phenylpyruvic acid, which interferes with the development of the nervous system. discovered through a standard ing response (most were steri approaches in the next section pheromone (hormone) releas» binds to a membrane receptor brane and activates the proteir sequential protein phosphoryl. cade activates the transcriptio: cell to mate. A mutation at
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