Saturday, February 21, 2009

Sugar Baby!!

So what happens after we devour our Valentine's Day Chocolate? 

First, Glucose (sugar molecule) gets converted into Glucose-6-phosphate (G6P) by an enzyme called hexokinase (in liver, the enzyme is called glucokinase), a highly regulated enzyme. Afterwards, G6P gets isomerized into Fructose 6 Phosphate (F6P) by an enzyme called phosphofructokinase (PFK1), which is another highly regulated enzyme. F6P then gets cut in half into two products: DHAP and G3P by an enzyme called aldolase. DHAP then transformes into G3P. So now we have 2 G3P. The 2 G3P both become phosphorylated to become 1,3 bisphophogylcerate (1,3 BPG) by an enzyme called G3P dehydrogenase, which uses 1 inorganic phosphate per G3P and produces 1 NADH per G3P. Now we have 2 1,3BPG. This is where oxidative phosphorylation occurs, where 1 phosphate gets plucked off 1,3 BPG by phosphoglycerate kinase, yielding 3PG. This yields 1 ATP per 1,3BPG. Now, our bodies then change the 3PG to 2PG by phophoglyceromutase. 2PG then gets reduced to phosphoenolpyruvate (PEP) by enolase. Finally, the PEP becomes pyruvate by the third highly regulated enzyme, pyruvate kinase. The conversion of PEP to pyruvate also yields ATP. 

The 3 highly regulated enzymes in this reaction are:

hexokinase (glucokinase in liver)
phosphofructokinase (PFK) 
pyruvate kinase

These enzymes not only facilitate irreversible reactions but are also key sites for control of the glycolytic pathway.

It boggles my mind that an act as simple as eating a candy bar can elicit so many metabolic reactions without us consciously knowing. 

Friday, February 20, 2009


Saturday, February 14, 2009


Physicians have a duty to only certify that which they have personally verified. 

Wednesday, February 11, 2009

My happiness cannot depend on the weather, environment, or people. If I let these factors dictate how I feel, I will never be in control of my happiness or my life. 

Sunday, February 08, 2009


I am exhaustified and have no one to bitch to..and here you are..

So, I'm a bit overwhelmed...I feel like there is too much studying and not enough hours to complete everything....

it's funny how 1 week makes you feel SO behind

Sunday, February 01, 2009

Yes, I'm in Med School!

So, a lot of things have happened since my last LAME entry.

1: I left Texas.
2. I started med school!!

So, med school is a lot of work...I love it!

Tomorrow will begin my 3rd week and we will be learning all sorts of exciting stuff such as the introduction to metabolism, bioenergetics, structures of the arm, and histology of bone and muscle. I don't get much sleep these days, but I don't feel it.

Going to this medical school is one of the best decisions I have made in my life.