Four samples sent for DNA testing share the same DNA profile of a 'male Y', says a chemist
KUALA LUMPUR: A chemist who carried out DNA matching on DNA extracted from a morning towel, toothbrush and a mineral water bottle, today told the High Court hearing the sodomy trial of Anwar Ibrahim that they matched two DNA samples lifted from the anus of complainant Mohd Saiful Bukhari Azlan.
Nor Aidora Saidon said four samples were handed over to her by investigating officer DSP Jude Pereira on July 17, 2008 for DNA testing and she later positively concluded through DNA analysis that they shared the same DNA profile of a “male Y” as stated in the chemist report of Dr Seah Lay Hong.
The sixth prosecution witness also told the court that she lifted a strain of hair from the morning towel but its DNA profile did not match that of “male Y”.
During examination-in-chief by deputy public prosecutor Noorin Badaruddin, Nor Aidora said she collected four swabs from the towel, two from the bottle and two from the toothbrush.
She explained further that the samples were subjected to the polymerase chain reaction (PCR) test before she printed out the electropherogram graphs to confirm presence of DNA other than those of Mohd Saiful.
PCR is a scientific technique in molecular biology to amplify a single or a few copies of a piece of DNA across several orders of magnitude, generating thousands to millions of copies of a particular DNA sequence.
However, during today’s proceedings there was no explanation on how they obtained the samples or who the samples belong to.
Anwar, 63, is charged with sodomising Mohd Saiful, 25, his former personal aide, at Unit 11-5-1 of Desa Damansara Condominium in Jalan Setiakasih, Bukit Damansara, between 3.01pm and 4.30pm on June 26, 2008.
Common DNA profile
Questioned further by Noorin whether she compared short tandem repeat (STR) analyses of the graphs of three samples (bottle, toothbrush and towel) with graphs of samples examined by Seah, Nor Aidora said her analysis of the graphs matched the findings of Seah, which further confirmed that they shared a common DNA profile.
“The findings also confirmed that all the samples analysed by me and Seah came from the same source, which is ‘male Y’,” explained Nor Aidora.
Questioned further whether she carried out additional camparisons of her findings on the DNA extracts and those of “male Y”, she replied she did match probability study.
She explained that the study involved DNA database of the Malaysian population in particular Malays and Indians, before confirming the extracts belonged to “male Y”.
Earlier, defence counsel Karpal Singh had sought a brief adjournment of the proceedings when Nor Aidora repeatedly referred to data on her findings but copies of which were not supplied to the defence team.
After a brief exchange on the matter between Karpal Singh and Solicitor-General II Mohamed Yusof Zainal Abiden, Mohamed Yusof agreed to supply the defence copies of the documents, even though initially he had contended that the witness was just referring to the notes to refresh her memory.
Immediately after copies of the notes were furnished to the defence, another defence counsel Ram Karpal Singh applied to the court to defer further examination-in-chief of Nor Aidora to Friday on the grounds that Dr Brian Mcdonald, who is assisting the defence team on DNA matters, needed time to study the data.
Trial judge justice Mohamad Zabidin Mohd Diah agreed to the request and instructed the prosecution to call a fresh witness tomorrow.
-Bernama
KUALA LUMPUR: A chemist who carried out DNA matching on DNA extracted from a morning towel, toothbrush and a mineral water bottle, today told the High Court hearing the sodomy trial of Anwar Ibrahim that they matched two DNA samples lifted from the anus of complainant Mohd Saiful Bukhari Azlan.Nor Aidora Saidon said four samples were handed over to her by investigating officer DSP Jude Pereira on July 17, 2008 for DNA testing and she later positively concluded through DNA analysis that they shared the same DNA profile of a “male Y” as stated in the chemist report of Dr Seah Lay Hong.
The sixth prosecution witness also told the court that she lifted a strain of hair from the morning towel but its DNA profile did not match that of “male Y”.
During examination-in-chief by deputy public prosecutor Noorin Badaruddin, Nor Aidora said she collected four swabs from the towel, two from the bottle and two from the toothbrush.
She explained further that the samples were subjected to the polymerase chain reaction (PCR) test before she printed out the electropherogram graphs to confirm presence of DNA other than those of Mohd Saiful.
PCR is a scientific technique in molecular biology to amplify a single or a few copies of a piece of DNA across several orders of magnitude, generating thousands to millions of copies of a particular DNA sequence.
However, during today’s proceedings there was no explanation on how they obtained the samples or who the samples belong to.
Anwar, 63, is charged with sodomising Mohd Saiful, 25, his former personal aide, at Unit 11-5-1 of Desa Damansara Condominium in Jalan Setiakasih, Bukit Damansara, between 3.01pm and 4.30pm on June 26, 2008.
Common DNA profile
Questioned further by Noorin whether she compared short tandem repeat (STR) analyses of the graphs of three samples (bottle, toothbrush and towel) with graphs of samples examined by Seah, Nor Aidora said her analysis of the graphs matched the findings of Seah, which further confirmed that they shared a common DNA profile.
“The findings also confirmed that all the samples analysed by me and Seah came from the same source, which is ‘male Y’,” explained Nor Aidora.
Questioned further whether she carried out additional camparisons of her findings on the DNA extracts and those of “male Y”, she replied she did match probability study.
She explained that the study involved DNA database of the Malaysian population in particular Malays and Indians, before confirming the extracts belonged to “male Y”.
Earlier, defence counsel Karpal Singh had sought a brief adjournment of the proceedings when Nor Aidora repeatedly referred to data on her findings but copies of which were not supplied to the defence team.
After a brief exchange on the matter between Karpal Singh and Solicitor-General II Mohamed Yusof Zainal Abiden, Mohamed Yusof agreed to supply the defence copies of the documents, even though initially he had contended that the witness was just referring to the notes to refresh her memory.
Immediately after copies of the notes were furnished to the defence, another defence counsel Ram Karpal Singh applied to the court to defer further examination-in-chief of Nor Aidora to Friday on the grounds that Dr Brian Mcdonald, who is assisting the defence team on DNA matters, needed time to study the data.
Trial judge justice Mohamad Zabidin Mohd Diah agreed to the request and instructed the prosecution to call a fresh witness tomorrow.
-Bernama
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