Tag Archives: Tristan da Cunha

What did Sequana really find at Tristan da Cunha?

The Tristan study described before was leading to patent US6087485A. It describes

highly significant linkage in the genome scan (p=0.0001 for history of asthma and p=0.0009 for methacholine challenge) … at D11S907, a marker on the short arm of chromosome 11.

D11S907 or  AFM109YA1 is a microsatellite marker located at 11p13 in a gene known as EHF.  There should be 2 genes in close proximity of the marker: ASTH1I and ASTH1J.

ASTH1I and ASTH1J were detected by exon trapping. ASTH1I exons detected a 2.8 kb mRNA expressed at high levels in trachea and prostate, and at lower levels in lung and kidney …
ASTH1J exons detected a 6.0 kb mRNA expressed at high levels in the trachea, prostate and pancreas and at lower levels in colon, small intestine, lung and stomach.

The sequences of  table 2 in the patent are sufficient now to locate ASTH1I and ASTH1J. Continue reading What did Sequana really find at Tristan da Cunha?