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~ History, Decorative Arts, Buildings

COLONEL UNTHANK'S NORWICH

Tag Archives: Norfolk Heritage Centre

Pizza dough and lampshades

20 Wednesday Jan 2016

Posted by reggie unthank in Decorative Arts

≈ 4 Comments

Tags

Norfolk Heritage Centre, Norwich buildings, Paul Nurse, Pizza Express Norwich, The Forum Norwich

This week I was doing research on Colonel Unthank in Norwich Library’s Heritage Centre in The Forum – what a resource. And I came across something that I thought would make a quick post  before tackling my namesake.

The Forum Norwich.jpg

The Forum, Norwich

While eating a restorative pizza on the mezzanine I noticed the molecular models decorating the lampshades in Pizza Express  (other pizza outlets are available).
Pizza Express Pixlr.jpg

These molecular models represent the four DNA bases that make up the genetic code

Then, at the opposite end of the mezzanine I saw a photograph that explains the molecular theme.

Paul Nurse Pixlr.jpg

Sir Paul Nurse, Norwich-born Nobel Laureate

Apart from Norwich being Paul’s birthplace the connection must be about yeast and pizza dough, no?

Pizza dough.jpg

Baker’s yeast in action

The yeast used in pizza, and baking in general, is baker’s yeast. But Paul Nurse worked on a different kind of yeast, fission yeast, that divides in a slightly different way.

yeast4.jpg

Baker’s yeast grows by protruding a bud

Normally, a freshly-divided cell must grow to (at least) double its birthweight before an internal regulator allows it to divide again (double-up/halve/double-up/halve etc etc). Otherwise the result would be smaller and smaller cells that eventually disappear down their own navels. Paul was working on a mutant fission yeast that did produce abnormally small cells. In the Scottish lab’ in which he worked these small cells were called wee (wee2).

S pombe

Fission yeast divide in the middle instead of budding

Paul identified the gene responsible for the premature division in fission yeast. It turned out to be synonymous with a gene that Leland Hartwell in the USA had shown to control cell division in baker’s yeast. So, the two sorts of yeast may divide differently but they share the same mechanism for initiating division.

The third character in this story is Tim Hunt. Working on sea urchin eggs he saw that one particular protein accumulated steadily during the build-up to division but suddenly disappeared when all the cells divided. This cyclic protein – unsurprisingly called cyclin – turned out to bind to the regulatory protein identified by Nurse and Hartwell.

Strongylocentrotus_franciscanus Kirt L Onthank.jpg

Sea urchin (Photo: Kirt L Onthank)

These two proteins form part of the complex that ‘tells’ a cell when it is ready to divide. This complex is found in all living things from yeast to man and when faulty plays a part in cancer.

Pizza.jpg

Niçoise pizza on a gluten-free base

The 2001 Nobel Prize for Physiology or Medicine was shared three ways by Paul Nurse, Leland Hartwell and Tim Hunt.

Respect to Pizza Express for choosing such a brave theme

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