Biochem Flashcards
(187 cards)
Glycogen storage diseases Very Poor Carbohydrate Metabolism
VON GIERKE glucose 6 phosphatase POMPES alpha 1 4 glucosidase CORI alpha 1 6 glucosidase MCARDLE glycogen phosphorylase
Glucose transporters not requiring insulin
GLUT 13 brain kidney placenta GLUT 2 liver pancreatic B cell SI Kidney
GLUT requiring insulin
GLUT 4 Heart Skeletal muscle Adipocytes
GLUT 1
RBC COLON Brain KidneyPlacenta
GLUT 3
Brain Kidney Placenta
GLUT 5
Small intestines
Location of glycolysis
cytoplasm
3 carbon end products of glycolysis
Pyruvate or Lactate
rate limiting step of glycolysis
PFK 1 from fructose 6 phosphate TO fructose 1 6 bisphosphate
3 irreversible steps of glycolysis
1 phosphorylation of glycose via GLUCOKINASE or HEXOKINASE. 2 phosphorylation of fructose 6 phosphate via PFK1. 3 formation of pyruvate via PYRUVATE DEHYDROGENASE.
No of ATP from substrate level phosphorylation in Glycolysis
4 ATP
No of ATP needed for glycolysis
2 ATP
ATP production in glycolysis using KINases ie phosphate transfer into ADP
1 3 biphosphoglycerate and PEP
NADH prodc in glycolysis
glycealdehyde 3 phosphate to 1 3 bisphosphoglycerate via a DEHYDROGENASE
Malate aspartate shittle liver kidney heart vs glycerol phosphate shuttle in brain and sk ms
Malate 1 NADH to 3 ATP via NADH e acceptor complex I while Glycerol 1 NADH to 2 ATP via FADH e acceptor in complex II
organs that are Strictly anaerobic glycolysis
RBC lens cornea medulla of kidney testes WBC
NET ATP yield from Glycolysis
Anaerobic 2 ATP. Aerobic ATPs ff NADG 4 or 6 with net ATP of 6 or 8 depending on shuttle used.
Function of 2 3 Bisphosphoglycerate
reduces Hgb affinity for O2 hence releasing it. Note fetal hgb has higher 2 3 biphosphoglycerate than mom
Arsenic poison competes with
1competes with phosphate as substrate for GLYCERALDEHYDE 3 P DEHYDROGENASE 2 binds lipoic acid so PYRUVATE DEHYDROGENASE wont work therefore no NADH is produced during glycolysis to go into ETC
MC enzyme defect in glycolysis
Pyruvate kinase deficiency presents as chronic hemolytic anemia
2 enzymed requiring 5 co enzymes
1 pyruvate dehydrogenase 2 Alpha ketogluterate Dehydrogenase of TCA
5 co enzymes of the divas Love Never Fails To Conquer
Lipoic acid Niacin riboFADin Thiamine Co enzyme A with B5
MCC congenital lactic acidosis
Pyruvate dehydrogenase deficiency X linked
Site of TCA
mitochondrial matrix EXCEPT succinate dehydrogenase aka Complex II in inner mitochondria