Ribose

In an alpha ribose, our new OH group and this CH2OH group are on opposite sides of the ring, away from each other.

And in a beta ribose, the groups are on the same side of the ring, or by each other.

And we're done! Ribose is an important pentose, but these four carbohydrates are the most abundant hexoses in nature.

Glucose, galactose, and mannose all form six-membered furanose rings as their most stable structure, while fructose usually forms a five-membered furanose ring, Let's practice by drawing a Hayworth projection of alpha D-glucose.

We need to start with a six-membered ring this time, and we place the oxygen atom in the upper right.

Okay, so many people may have heard about ribose because of RNA and maybe DNA.

So how is your sugar similar and different to ribose?

Ribose is an aldose.

So it belongs to the second or to the other type of sugars.

And as I said, erythrolose is a ketose.