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Benedek asked if his results indicated a "parasexual cycle in fungi" but Pontecorvo said it was not as there was "no exchange of genetic material" between Nannizzia and Chrysosporium.

Papers of Guido Pellegrino Arrigo Pontecorvo, geneticist, Professor of Genetics, University of Glasgow, Scotland

Papers of Guido Pellegrino Arrigo Pontecorvo, genetics research correspondence

Research correspondence marked  'Research 1960s-1980s'

Thank you card sent to Pontecorvo from Richard Benedict Goldschmidt

Bundle of correspondence between Pontecorvo and Professor Boris Ephrussi concerning Pontecorvo's discovery of a "method of haploidization"

Correspondence between Pontecorvo and Professor Boris Ephrussi concerning Ephrussi's work on hybrid clones and Pontecorvo's trip from Baltimore to Denver in the summer

Correspondence between Pontecorvo and Professor Mogens Westergaard in which Westergaard asks Pontecorvo for advice and data on somatic mapping as he is keen to cover this topic in his book

Bundle of correspondence between Pontecorvo and Dr B S Cox in which Cox requests some marked strains of Aspergillus niger for experiments to explore the extent to which parasexual recombination occurs in natural conditions

Letter to Pontecorvo from [Prof. Giuseppe Levi]

Bundle of correspondence between Pontecorvo and A P Hamilton in which Mr Hamilton asks Pontecorvo some questions on his use of Aspergillus nidulans and his knowledge of literature on para-fluoro-phenyl alanine

Bundle of correspondence between Pontecorvo and Professor Dan Lewis concerning Lewis's work on methionine suppressors and Pontecorvo's Leewenhoek lecture

Bundle of correspondence between Pontecorvo and Professor R Ceppellini in which Pontecorvo asks for his comments on his Leewenhoek lecture manuscript

Letter to Pontecorvo from Bernie [Weissbloom] discussing an experiment on the attachment of N-Acetyltyrosine to SRNA

Correspondence between Pontecorvo and Dr S H Kindler discussing Kindler's work on the inhibiting effect of leucine on phenylalanine using a mutant of E. coli

Correspondence between Pontecorvo and Dr Richard I Mateles concerning Pontecorvo's work with Aspergillus flavus-oryzae

Bundle of correspondence between Pontecorvo, Professor Boris Ephrussi and Professor Henry Harris concerning Harris's paper on heterokaryons

Bundle of correspondence between Pontecorvo and Dr Julius Marmur concerning Pontecorvo's instructions on how to isolate DNA from Aspergillus

Copy letter from Pontecorvo to Dr Hubert Rees of the Department of Agricultural Botany at the Institute of Rural Science in Aberystwyth concerning Pontecorvo's interest in Rees's paper in Natureon nuclear variation in angiosperms

Correspondence between Pontecorvo and Dr Marie Musílková concerning his research on isolating high molecular weight DNA from Aspergillus nidulans

Letter to Pontecorvo from Professor Boris Ephrussi in which he asks Pontecorvo for the procedure and results of his recent experiement to revert chromosome loss in human-mouse hybrids

Correspondence between Pontecorvo and Dr Mary Weiss concerning Weiss's research on hybrids

Letters to Pontecorvo from Professor Jack A Lucy concerning his experiments with lysolecithin treated 3T3 and WG cells for his research on cell fusion

Correspondence between Pontecorvo and Guglielmo concerning their research

Photocopied page of experiment results sent to Pontecorvo from Marcello Siniscalco

Correspondence between Pontecorvo and Professor Francis Harry Compton Crick concerning Pontecorvo's comments on Crick's draft paper titled  'A general model for the chromosomes of higher organisms'

Correspondence between Pontecorvo and Dr Barbara Migeon concerning techniques for the isolation of diploid cells and cloning

Copy of a letter from Pontecorvo to Professor Boris Ephrussi concerning Ephrussi's research on hybrid clones

Correspondence between Pontecorvo and Professor Duncan Macdonald concerning his recent article due to be published in Natureand personal and family news

Correspondence between Pontecorvo and Professor Edward Charles Cocking concerning references to literature on Methacel (Methylcellulose) and temperature sensitive mutants

Copy of a letter from Pontecorvo to Professor William Hayes concerning Hayes's recent Bateson Lecture

Correspondence between Pontecorvo and Dr Theodore ("Ted") Puck concerning Pontecorvo's suggestion (and explanation) of an auxotroph selection technique which he used on Aspergillus

Correspondence between Pontecorvo and Dr Frank G Rothman concerning the use of griseofluvin for segregation in human cells and an erroneous reference in Nature

Copy of a letter from Pontecorvo to Dr Thomas H Roderick concerning the research proposal for a three-phase study of germplasm resources submitted by Dr R B Stevens of the National Research Council

Copies of letters from Pontecorvo to Dr John Forster Cairns concerning his ideas on stem cells conserving "W or C in the stem lineage"

Correspondence between Pontecorvo and Professor Ruggero Ceppellini concerning the possibility of them taking part in some joint research in the new Roche Laboratory for cell genetics

Card sent to Pontecorvo from Johann Friedrich Georg Melchers concerning his research on introducing artificial sex in somatic cells

Correspondence between Pontecorvo to Dr John Tooze, Executive Secretary of the European Molecular Biology Organization (EMBO) concerning his ideas for a 2-3 days workshop to demonstrate polyethylent glycol fusion

Correspondence between Pontecorvo and Dr Vincenzo Miggiano concerning research on cell fusion and Pontecorvo's course on Polyethylene glycol (PEG) fusion to be held in January 1977

Copies of letters from Pontecorvo to Dr Joan K Stadler concerning his research on "fusion competence"

Bundle of correspondence between Pontecorvo to the Committee on the Safety of Medicine at the Departement of Health and the Medical Director of Glaxo Laboratories

Copies of letters sent from Pontecorvo to Dr Mary Weiss concerning the technique of Polyethylene glycol (PEG) cell fusion

Copies of letters sent from Pontecorvo to Dr P Schaeffer concerning the technique of Polyethylene glycol (PEG) cell fusion

Letters from Professor Charlotte ("Lotte") Auerbach asking if he was aware of the referee who commented on her book Mutation research

Copy of a letter from Pontecorvo to Dr Robert Cecil Olby concerning his thoughts on Olby's book Path to the double helix

Bundle of correspondence between Pontecorvo and Miranda Robertson, the Editor of Nature,concerning a comment made at the Friedrich Miecher Institut Symposium on Biology by Charles Weissman about "splicing"

Correspondence between Pontecorvo and Professor T Benedek concerning interesting results on his experiments to mate strains of Nannizzia with Chrysosporium

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Correspondence between Pontecorvo and Professor T Benedek concerning interesting results on his experiments to mate strains of Nannizzia with Chrysosporium

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