Bio-Chemistry

[ComradeRed]

I have several questions. First of all, where -on the web- is a good site on BioChemistry? Secondly, in a molocule(Histidine for example) what does the hexagon mean in the Lewis structure? And in other molocules, what is the circle within a hexagon mean?

[redstar2000]

Google biochemistry + introduction.

I found this one...

http://en.wikibooks.org/wiki/Biochemistry_-_Introduction

I can't answer your other question; all I know is that when such lines are drawn, they indicate a co-valent chemical bond (often more than one).

http://www.websmileys.com/sm/cool/123.gif

[Vinny Rafarino]

in a molocule(Histidine for example) what does the hexagon mean in the Lewis structure?

They are called cyclic molecular rings that consist of 3 or more bonded atoms.


And in other molocules, what is the circle within a hexagon mean?

Delocalised Pi bonding electrons.

[Severian]

A hexagon means 6 carbon atoms in a ring. By itself, cyclohexane. Similarly for other polygons - number of corners equals number of carbons. Or with a crooked line.

The circle means it's a benzene ring - represents the electrons constantly circulating around the ring.

These questions sound more like the stuff covered in Organic Chemistry.