The opposition Temn encountered when he proposed , as
early as 1964, that the RNA of the Rous Sarcoma Virus
was copied into DNA and integrated into the genome,
was not the consequence of a blind belief in the Central
Dogma as many sggested . It w as more due to the ab -
sence of experimental evidence in favour of this hypoth -
esis: the experiments of Temin using different inhibitors
and labels were in conclusive.
Let us add another piece to this complex history. Crick
had not rejected the possibility of a conversion of RNA
into DNA , but he considered that it was probably a rare
phenomenon . In contrast, Temin suggested in his 1970
publication that this discovery might have strong im -
plications" f0r theories of information transfer. He later
developed these perspectives in furth er publications in
which he explained how actively expressed genes could
be amplified in the genome by such a process. Therefore,
there could be a return from the activation state
of the genome to its structure, a Lamarckian process at
the cellular level! Although the numerous `selfish ' DNA
sequences in the genome of eukaryotes are probably the
result of the action of reverse transcriptase, the `heretical'
propositions of Temin have not been confirmed .
The discovery of protein-only pathogenic agents has also
been considered as a blow to the Central Dogma. Prions
are cellular proteins that are able to change their con -
form ation to adopt a path ogenic, prone-to-aggregation
form . This conversion is spontaneous, or activated by
the pathogenic form . It explains the occurrence of both
spontaneous and infectious cases of these diseases. There
is a transfer of 3-dimensional information from the patho -
genic form of the protein to the normal one. But if we
return to Crick 's lecture, the only form of informatio n
he considered was sequence in formation . The hypoth -
esis that all the information with in a cell originates in
the linear sequence of DNA - a popular version of the
Central Dogma - does not fit the in itial wording of this
The opposition Temn encountered when he proposed , as
early as 1964, that the RNA of the Rous Sarcoma Virus
was copied into DNA and integrated into the genome,
was not the consequence of a blind belief in the Central
Dogma as many sggested . It w as more due to the ab -
sence of experimental evidence in favour of this hypoth -
esis: the experiments of Temin using different inhibitors
and labels were in conclusive.
Let us add another piece to this complex history. Crick
had not rejected the possibility of a conversion of RNA
into DNA , but he considered that it was probably a rare
phenomenon . In contrast, Temin suggested in his 1970
publication that this discovery might have strong im -
plications" f0r theories of information transfer. He later
developed these perspectives in furth er publications in
which he explained how actively expressed genes could
be amplified in the genome by such a process. Therefore,
there could be a return from the activation state
of the genome to its structure, a Lamarckian process at
the cellular level! Although the numerous `selfish ' DNA
sequences in the genome of eukaryotes are probably the
result of the action of reverse transcriptase, the `heretical'
propositions of Temin have not been confirmed .
The discovery of protein-only pathogenic agents has also
been considered as a blow to the Central Dogma. Prions
are cellular proteins that are able to change their con -
form ation to adopt a path ogenic, prone-to-aggregation
form . This conversion is spontaneous, or activated by
the pathogenic form . It explains the occurrence of both
spontaneous and infectious cases of these diseases. There
is a transfer of 3-dimensional information from the patho -
genic form of the protein to the normal one. But if we
return to Crick 's lecture, the only form of informatio n
he considered was sequence in formation . The hypoth -
esis that all the information with in a cell originates in
the linear sequence of DNA - a popular version of the
Central Dogma - does not fit the in itial wording of this
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