Login

Join for Free!
114960 members


The structures of Lipid molecules

Discussion of all aspects of cellular structure, physiology and communication.

Moderator: BioTeam

The structures of Lipid molecules

Postby mistique » Mon Feb 26, 2007 11:32 am

Hey everyone out there.

Does anyone know what the answer to this question could possibly be:

"Note the structures of the three steroid lipid molecules (in this case, cholesterol, testosterone and oestrogen). Compare their structure with the general structures of fat and phospholipid molecules."

It would be very helpful if someone could help me with this question as i have a SAC coming up soon..
Thanks :) [color=blue]
mistique
Garter
Garter
 
Posts: 11
Joined: Tue Feb 20, 2007 6:18 am

Postby victor » Fri Mar 02, 2007 2:09 pm

Compare? okay then...
Well, as far as I know that cholesterol, estrogen and testosterone have one thing in common, which is steroid ring. This steroid ring is a lipid, which is formed as a cyclic ring.
Whicle those whom you call fat, have an aliphatic (open) form as a chain. Fat is a triacyl glycerol, which consist of three acyl molecules and one glycerol. In phospolipid, commonly this acyl is the main component of the hydrophobic tail, whicle the phosphate group act as a hydrophilic head.
Q: Why are chemists great for solving problems?
A: They have all the solutions.
User avatar
victor
King Cobra
King Cobra
 
Posts: 2668
Joined: Sat Apr 30, 2005 12:01 pm
Location: Yogyakarta, Indonesia..

Postby Dr.Stein » Sat Mar 03, 2007 2:00 am

Both testosterone and estrogen are derived from cholesterol. Steroid has a special characteristic, which is a cyclo-pentano-perhydro-phenanthren nucleus. Cholesterol will undergo many pathways of enzymatic reaction a.k.a. steroidogenesis to derive its steroid hormones, i.e. gonad hormones and cortex adrenal hormones.
Image
User avatar
Dr.Stein
King Cobra
King Cobra
 
Posts: 3501
Joined: Thu Jul 07, 2005 7:58 am
Location: 55284 Yogyakarta, Indonesia



Return to Cell Biology

Who is online

Users browsing this forum: No registered users and 3 guests

cron