Oh deer…

Roisin McMahon gets us into the jollity of the season….

Did Rudolph go to school?

No. He was Elf-taught.

What do reindeers hang on their Christmas trees?


How come you never head about the tenth reindeer, Olive?

Because Olive, the other reindeer, used to laugh and call him names

What is it?

Today’s festive crystal structure is of reindeer β-lactoglobulin. β-lactoglobulin is a whey protein present in the milk of many but not all mammals. It is not found in human milk. Despite extensive investigation, the function of β-lactroglobulin is not yet known. It may be a food source, or it may function as a carrier protein as it is known to bind hydrophobic molecules.

UntitledWhat does it look like?

β-lactoglobulins are part of the lipocalin superfamily. They have a 8 stranded β-barrel fold with one α-helix. Hydrophobic molecules such as retinol or palmitic acid can bind within the centre of the barrel.

Where did the structure come from?

This structure is of reindeer β-lactoglobulin. The protein was purified from reindeer milk. (Q. How do you milk a reindeer? Answers on a post card please as I really wish I had a punch line for this one.) It is PDB ID 1YUP1.


  1. Oksanen et al., Acta Crystallographica Section D 2006. 62:1369-1375

Jokes from here http://www.whychristmas.com/fun/cracker_jokes.shtml and here http://www.bjentertainments.co.uk/dan/xmas%20jokes.htm


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