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77 Cards in this Set
- Front
- Back
phosphofructokinase
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rate limiting step in GLYCOLYSIS
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fructose 6 phosphate>>>>
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fructose 1,6,-biphosphate
|
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phosphofructokinase stimulated by
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adp
amp |
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ATP and citrate inhibit
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phosphofructokinase
|
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what converts
fructose 1,6 -biphosphate >>> two 3-Carbon metabolite |
aldolase
|
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aldolase found
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skeletal
heart mm |
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glucose 6-phosphate>>> fructose 6-phosphate
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phosphoglucose isomerase
|
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triose phosphate isomerase
INTERCONVERTS |
dihydroxyacetone phosphate
glyceraldehyde 3-P |
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lots in liver
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GPT
glutamate - pyruvate transminase |
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GPT
GOT |
liver
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CPK
LDH GOT GPT |
HEART
|
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HEART ATTACK -
FIRST ENZYME |
1-CREATINE KINASE
2-GOT 3-GPT 4-LDH |
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first step in AA catabolism
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alpha amino group removal
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glutamate dehydrogenase
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oxidative deaminatin of glutamate
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transaminases not involved in oxidative deamination rxns
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1-ast
2-alt |
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electron acceptors for glutamate dehydrogenase
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NAD
NADP |
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glutamate>>> alpha ketoglutarate
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glutamate dehydrogenase
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oxidative deamination occurs
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liver
kidney |
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whatch get from oxidative deamination
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alpha ketoacids=energy
ammonia=source of Nitrogen in urea synthesis |
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histadine when deaminated>>>
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ammonium ion NH4
|
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serine deaminated>>>
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pyruvate
|
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threonine deaminated>>>
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alph ketobutyrate
|
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found in erythrocytes
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carbonic anhydrase
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carbonic anhydrase catalyses
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co2
h20 |
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most of CO2 transported in blood as
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bicarbonate ion
HCO3 |
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coenzyme Q =
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ubiquinone
|
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what passes electrons to heme-containing cytochromes
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FMN
Coenzyme Q=ubiquinone |
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riboflavin>>
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FMN
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inner memebrane of mitochondria
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ETC components
|
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body synthesize
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coenzyme Q
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ultimate electron acceptor
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o2
|
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what is reduced to water
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oxygen
|
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haloenzyme=
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1-coenzyme
2-apoenzyme |
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lower the activation energy for the rxn they catalyze
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enzymes
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enhance rxn rate
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enzymes
|
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cofactors require
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metal ions
vit derivative |
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dissolve fibrin
|
plasmin
|
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fibrinogen found...
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plasma
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fibrinogen >> fibrin
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thrombin
|
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prothrombin formed
|
liver
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zymogens activated by removal of
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peptide fragmend in lumen of GI
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starch >>
maltose dextrin |
beta amylase
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alpha amylase
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starch >>> oligosaccharides
pytalin pancreatic amylase |
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what is absorbed in SI
|
monosacch
|
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sucrose=
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1-fructose
2-glucose |
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lactose
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1-galactose
2-glucose |
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glucose 6-P
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liver
|
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process where glucose made form non CHO molecules
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gluconeo-genesis
mainly AA not FA |
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lactic acid/AA >>
pyruvate/phosphoenolpyruvate |
gluconeogenesis
|
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catalyze last step in gluconeogenesis
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glucose 6- phosphate
|
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pyruvate carboxylase
*gluconeogenesis* |
pyruvate > oxaloacetate
|
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PEPCK
*gluconeogenesis* |
oxaloacetate > PEP
|
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fructose 1, 6,-biphosphatase
*gluconeogenesis* |
fructose 1,6-biP > F-6-P
|
|
glucose 6-phosphatase
*gluconeogenesis* |
glucose 6-p > glucose
|
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no high energy bond
|
glucose 6 phosphataase
|
|
gluconeogenesis >
glcolysis > |
pyruvate to glucose
glucose to pyruvate |
|
Km
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units of molarity
|
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Km depends on
|
1-temp
2-ionic strength |
|
lower Km
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higher the affinity
|
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competitive inhibitor
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increase Km
|
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low Km
high Km |
higher affinity
presence of competitive inhibitor |
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Vmax
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when all enzyme site are saturated
|
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dont follow michaelis-menton kinetics
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allosteric enzymes
|
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covalent modification
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phosphorylation/
dephosphorylation |
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glycogen synthase
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glycogen synthesis
|
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glycogen synthesis substrate
|
UDP-glucose
|
|
hexokinase
*glycogen synthesis* |
glucose > glucose 6-P
|
|
glucokinase
*glycogen synthesis* |
glucose > glucose 6-P
*liver* |
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what makes 1,4 linkages in glycogen
|
glycogen synthase
|
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irreversible inhibitors
*aspirin* |
destroy fxn group
|
|
competitive inhibitors...
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Km increases
Vmax=no affect |
|
Vmax= decreased
Km= unchanged |
noncompetitive inhibition
|
|
enterokinase
|
trypsinogen > trypsin
|
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chief cells from stomach
|
pepsingen
|
|
high levels in carcinoma of prostate gland
|
acid phosphatase
|
|
high levels in
Pagets osteosarcoma |
alkaline phosphatase
|
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low alkaline phosphatase levels
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hypophosphatasia
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