June 20, 3.877

Dr. Aarou Klug, Tt0,R.S.
M.R.C. Laboratory of Holacula~ Biology
Hiller Wm.d, Carrabridge, 432 2QX
Euglartd .

  f was very glad to get your long latter and the draft of your paper,
but f hAd only time before the meeting to study them roughly and, (IS you
probably Iward Irma J&n, 1 dmmloped a virus inferct:lon during the aw&ing
so that it is only now that I bave had the ogprtunity to gs 0~81: it cam--
fUlly*

  ?4y only strong criticism is on a ratker drstailced point. As I tuld
John, you haw tto wideners at all that the umber of b-e-pairs pew super-
hdical turn is lmactlp 3.4  St ctmld just as easiSy be 7% Z/2 ur 82, Evera
tlm evidmc% that it is mar 80 ia ww& and Sndiratct, thmgh probblp cm-
rect.

  My main criticism a4 your papen- is that itd wr3tt4m 'histoxically'
rather than Pog2crlly.  34 you +t3811y hawe Silqgl~ crystal data for intact


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