ShmoopTube

00:03

Here’s your Shmoop du jour, packed full of protein.

00:06

If it doesn’t make you big and strong, it will at least make you big and…smart.

00:12

This is a passage about a technique used to separate proteins by weight.

00:19

The protein seen in sample 3 is most likely the same protein marked…where?

00:24

And here are the potential answers…

00:28

Here we’re being asked to look at the data on the chart and attempt to find a meaningful connection.

00:32

Kind of like online dating, but with less of a chance that you’ll wind up getting your kidneys stolen.

00:36

The protein seen in sample 3, shown here, is most likely which other protein?

00:40

We only have one type of data to go on here—protein weight, but that should be enough.

00:46

We can assume the same proteins also will have the same weight.

00:49

Imagine being blindfolded and you’re handed an apple. The person handing it to you says,

00:54

“This is an apple. I’m going to hand you some other things of various weights now,

00:58

and you need to tell me which one is probably also an apple.”

01:02

Then you’re handed a bottle of water. No, that’s not it.

01:05

What about this huge, heavy sandwich? No, but it smells great.

01:08

Aaaand finally, you’re handed another apple. That’s it, you’ve made the connection… and lunch!

01:13

We’re doing the same thing here in a way. We’ve got a protein in column C and we need

01:17

to identify the closest match by weight. Looking across, we can see that protein D

01:21

appears to weigh the same as the protein in column C. They’re probably the same protein.

01:26

D’s our answer. And so is roast beef on rye. Hold the mayo.

01:51

Full Transcript