UNIVERSITY OF LONDON

 

OF LONDON

Telegrams

POSGRADMED CHISK LONDON DUCANE ROAD
Tetephone LONDON, W.12
SHEpherds Bush 1260 (4 lines)
Department of
Bacteriology.

18th March, 1952.

Dear Cavalli,

I enjoyed very much seeing you the other day and was only
sorry that the time was not longer and that you could not come
up to my lab. and see something of my technique.

I am enclosing two to three mgs. of DNA-ase, This has
been prepared from ox pancreas, is free from RNA-ase and possesses
only a minimal amount of proteolytic activity. It is, I imagine,
about as pure as you will be able to obtain, You know that it
requires magnesium for activation, Normally it is used at a
concentration of about O01 mg/ml. but you may require to use it
in greater concentration in your work. In any case there should
be enough here to carry out your key experiments effectually. It
should be dissolved for use in 1% gelatin in M/500 MgCl.

Please don't thank me for this, but Dr: J. Cc. White of the
Haematology Department here, who prepared it. I will be inter-
ested to hear any results you get of it.

Looking forward to seeing you in Italy,

Yours sincerely,

filliow

   

Dr. L. Cavalli,
Instituto Sieroterapico Milanese,

Milan, Italy.