Post by: naved_s9994 on June 06, 2010, 04:48:08 pm
NH2 into the Carboxy of another,,,, then the other carboxy, in to the other NH2 ?
What have i missed??
Post by: Martoman on June 06, 2010, 04:56:18 pm
L-L-P
L-P-L
P-L-L
Ambiguous question however.
Post by: chansthename on June 06, 2010, 04:58:38 pm
I might do it in a few hours just to see what all the fuss (or lack thereof) is about.
I think you should post the question so that people who haven't done it can help too.
Post by: Martoman on June 06, 2010, 04:59:36 pm
A sample of leucine is added to proline and heated. A series of peptide molecules are formed from
the reaction.
The number of different dipeptide molecules possible in the mixture is?
Now since its a sample of leucine you can say that there is multiple L's which is why they are right.
Post by: ghadz7 on June 06, 2010, 05:12:16 pm
Leu - Leu
Pro - Leu
Pro - Pro
Where did L L L come from? 'Dipeptide' means only two combinations :s
Post by: m@tty on June 06, 2010, 05:50:37 pm
Post by: Martoman on June 06, 2010, 05:53:04 pm
Post by: chansthename on June 06, 2010, 08:19:00 pm
Post by: stonecold on June 06, 2010, 08:24:51 pm
Post by: Martoman on June 06, 2010, 08:26:11 pm
Post by: naved_s9994 on June 06, 2010, 08:30:23 pm
Sure does I posted this somewhere.
Are you sure...?
So if 4 aminos together, 24 combination????
Post by: m@tty on June 06, 2010, 08:32:56 pm
This only works when you are finding di-peptides, I am fairly sure.
EDIT:
Sure does I posted this somewhere.
Are you sure...?
So if 4 aminos together, 24 combination????
4 different amino acids will have
abcd
abdc
acbd
acdb
adbc
adcb
bacd
..
..
..
EDIT: I've just had a mental blank, I'm not sure about any of this...
Post by: stonecold on June 06, 2010, 08:34:35 pm
Post by: naved_s9994 on June 06, 2010, 08:34:45 pm
Except in cases like this, where you can have the same amino acid bonding together. In this case you use n2=22 = 4.
I see, thanks m@tty :)
Post by: naved_s9994 on June 06, 2010, 08:35:06 pm
Is 'n' the number of DIFFERENT amino acids?
Same.. in n^2
For different, u use n factorial
Post by: chansthename on June 06, 2010, 08:37:52 pm
Post by: stonecold on June 06, 2010, 08:39:34 pm
Post by: naved_s9994 on June 06, 2010, 08:40:11 pm
Good question!
m@tty?
3 factorial =6?
Or what?
Post by: m@tty on June 06, 2010, 08:43:14 pm
say you had pro, leu, leu. how many different combos?
Tri-peptides or di-peptides?
Wait, I assume you mean tri.
p-l-l
l-l-p
l-p-l
Only 3 I think. Because two are the same.
Post by: stonecold on June 06, 2010, 08:43:39 pm
Post by: chansthename on June 06, 2010, 09:23:49 pm
Post by: fady_22 on June 06, 2010, 09:59:39 pm
say you had pro, leu, leu. how many different combos?
Tri-peptides or di-peptides?
Wait, I assume you mean tri.
p-l-l
l-l-p
l-p-l
Only 3 I think. Because two are the same.
Depending on the specifics of the question, you could also have l-l-l and p-p-p.
Post by: naved_s9994 on June 06, 2010, 10:25:40 pm
say you had pro, leu, leu. how many different combos?
Tri-peptides or di-peptides?
Wait, I assume you mean tri.
p-l-l
l-l-p
l-p-l
Only 3 I think. Because two are the same.
Depending on the specifics of the question, you could also have l-l-l and p-p-p.
True!
This factorial stuff, only good for completely different amino acids.
Post by: kyzoo on June 06, 2010, 11:04:05 pm
Post by: Martoman on June 07, 2010, 12:03:29 am
Post by: chansthename on June 07, 2010, 04:34:30 pm
Question 17 with 3 ethers in maltose 0.o I did not see that coming
Got me as well
Post by: cama23 on June 07, 2010, 04:38:20 pm
sneaky pricks at tssm