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47 Cards in this Set
- Front
- Back
CPS 1
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location: mitochondria
pathway: urea cycle nitrogen source: ammonia |
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CPS 2
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location: cytosol
pathway: pyrimidine synthesis nitrogen source: glutamine |
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How does UV light damage DNA?
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creates thymine dimers on SAME strand of DNA
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DNA pol alpha (eukaryotic)
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replicates lagging strand, synthesizes RNA primer
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DNA pol beta, epsilon (eukaryotic)
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repairs DNA
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DNA pol gamma (eukaryotic)
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Replicates mitochondrial DNA
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DNA pol delta (eukaryotic)
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Replicates leading strand of DNA
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4 ways proteins interact with DNA
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1. helix turn helix
2. helix loop helix 3. leucine zipper protein 4. zinc finger motif |
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Metabolism site: mitochondria
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Fatty acid oxidation (beta oxidation), acetyl CoA production, TCA cycle, oxidative phosphorylation, ketone synthesis
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Metabolism site: cytoplasm
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Glycolysis, fattay acids synetheiss, HMP shunt, protein synthesis (RER), steroid synthesis (SER)
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Metabolism site: both
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Heme synthesis, urea cycle, gluconeogenesis
HUGs take two |
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Kinases
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uses ATP to add high energy phosphate group onto substrate
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Phosphorylase
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adds inoragnic phosphate onto substrate without using AtP
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Phosphatase
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removes phosphate group from substrate
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Dehydrogenase
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oxidizes substrate
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Carboxylase
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adds 1 carbon with help of biotin
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Glycolysis rate limiting step
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Phosphofructokinase 1 (PFK1)
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Gluconeogenesis rate limiting step
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Fructose 1,6 bisphosphatase
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TCA cycle rate limiting step
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Isocitrate dehydrogenase
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Glycogen synthesis rate limiting step
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Glycogen synthase
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Glycogenolysis rate limiting step
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Glycogen phosphorylase
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HMP shunt rate limiting step
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Glucose 6 phosphate dehydrogenase (G6PD)
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De novo pryimidine synthesis rate limiting step
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CSP II
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De novo purine synthesis rate limiting step
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Glutamine PRPP amidotransferase
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Urea cycle rate limitng step
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CSP I
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Fatty acid synthesis rate limiting step
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Acetyl CoA carboxylase (ACC)
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Fatty acid oxidation rate limiting step
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Carnitine acyltransferase I
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Ketogenesis rate limiting step
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HMG CoA synthase
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Cholesterol rate limiting step
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HMG CoA reductase
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Heme synthesis rate limiting step
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Aminolevulinic synthase
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Bile acid synthesis rate limiting step
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7 alpha hydroxylase
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Von Gierke's dz (type I)
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Severe fasting hypoglycemia, very high glycogen in liver, inc blood lactate, hepatomegaly, inc uric acid
Deficient enzyme: glucose 6 phosphatase |
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Pompe's disease (type II)
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cardiomegaly and systemic findings leading to early death by age 3 (trashes the pumps)
Deficient enzyme: lysosomal alpha 1,4 glucosidase (acid maltase) |
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Cori's disease (type III)
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Milder form of type I with normal bood lactate levels
Deficient enzyme: debranching enzyme (alpha 1,6 glucosidase) Gluconeogenesis is intact |
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McArdle's disease (type V)
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Inc glycogen in muscle but cannot break it down, leading to painful muscle cramps, myoglobinuria with strenuous exercise
Deficient enzyme: skeletal muscle glycogen phosphorylase |
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Phenylalanine derivatives
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--> tyrosine (thyroxine) --> dopa (melanin) --> dopamine --> NE --> epi
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Tryptophan derivatives
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B6 --> niacin --> NAD/NADP
BH4 --> serotonin --> melatonin |
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Histidine derivatives
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B6 --> histamine
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Glycine derivatives
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B6 --> porphyrin --> heme
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Arginine derivatives
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Creatine, urea, nitric oxide
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Gluamate derivatives
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B6 --> GABA (gluamate decarboxylase requires B6)
Glutathione |
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AI apolipoprotein
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Activates LCAT
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B 100 apolipoprotein
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Binds to LDL receptor, mediates VLDL secretion, IDL
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C II apolipoprotein
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Cofactor for lipoprotein lipase
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B 48 apolipoprotein
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Mediates chylomicron secretion
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E apolipoprotein
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Mediates Extra (remnant) uptake
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C III apoliprotein
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Inhibs LPL
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