Well what kind of evidence would you accept for “directed mutations” ?
ACTUAL evidence.
if peer reviewed articles are not enough then what would be good enough for you?
You mean the peer reviewed articles in which the earlier claims of 'directed mutation' were in effect retracted?
Why isent this article good enough for you?
This paper supports these 2 claims
1 organism can rearrange their DNA
2 This process is not random
No, it doesn't.
That is the major issue with people like you - you do not actually understand what you read.
Please note that it came out in February 1992. I referred to a paper from 2014 that - via actual research, not Shapiro's extrapolations - that what had earlier been thought to be directed mutations were actually illusions.
Shapiro seems to lump all manner of phenomena into his 'rearrangement' of the genome. For example, he considers exon shuffling to be 'genome rearrangements.'
These sorts of 'rearrangements' are not "directed", and they are only "nonrandom" in that, in terms of transposon-mediated exon shuffling for example, specific DNA sequences are involved. As I explained earlier, such sites are, literally, all over the genome. That on occasion some of this shuffling confers a benefic should not be a surprise. Remember when I told you about my experiment and I found thousands of binding sites in just part of one chromosome, and you dismissed it because you did not understand the implication?
Further - the term "nonrandom" or non-random" does not even occur in that paper.
He did mention "directed mutation" - but I hope you can accept that that concept is moot as I provided actual research on that which post-dates Shapiro's paper by almost 15 years. In fact, Shapiro writes:
"In some cases, we know that there is regulation from genetic analysis even though the molecular components have not yet been identified. Two good examples are the 'directed mutation' phenomenon in bacteria and hybrid dysgenesis in Drosophila.
(a) There have been numerous published and unpublished reports that prolonged incubation of bacteria under selective conditions triggers mutagenic processes ('directed mutation') that allow
the formation of mutant clones capable of growth (Shapiro, 1984; Cairns et al., 1988; Hall, 1988).
The results from various systems are quite consistent in showing that the frequencies of mutational events (base substitutions, frameshifts, excisions, fusions) increase by orders of magnitude under selection or related kinds of stress (Mittler & Lenski, 1990)."
Please note the name I bolded in red.
It was one of Cairns' collaborators that I cited previously, having found that their initial impressions were in error.
THAT is why I do not accept those claims.
So why isn’t the paper good enough to support these 2 claims? What else do you need in order to grant these 2 claims?
See above - now please update your copy-paste archive, purge it of Shapiro's speculative and refuted claims.