Project description:Analysis of microbial gene expression in response to physical and chemical gradients forming in the Columbia River, estuary, plume and coastal ocean was done in the context of the environmental data base. Gene expression was analyzed for 2,234 individual genes that were selected from fully sequenced genomes of 246 prokaryotic species (bacteria and archaea) as related to the nitrogen metabolism and carbon fixation. Seasonal molecular portraits of differential gene expression in prokaryotic communities during river-to-ocean transition were created using freshwater baseline samples (268, 270, 347, 002, 006, 207, 212).
Project description:Human skeletal tissue contains an abundance of proteins some of which may be preserved over geological timescales. The profiling of proteins from ancient individuals — or palaeoproteomics —has begun to provide new information about the diseases suffered in past societies. We describe here the first dental palaeoproteomic profiles of Iron Age individuals, collected from the site of Long Long Rak rockshelter in northwest Thailand. We recovered amino acid sequences for thousands of proteins preserved in their dental tissue, however, it is evident that these palaeoproteomic profiles comprise a palimpsest of modifications that occurred both ante-mortem and post-mortem. Palaeoproteomic profiles are able to categorise disease and show the capacity of these individuals for harboring a variety of illnesses prior to death. Here we apply for the first time palaeoproteomic analysis to five prehistoric human teeth from Southeast Asia. We combine this method with stable isotope analysis using δ18O and δ13C values to broadly identify the diet of these individuals. The specimens were collected from log coffins contained within the Iron Age site of Long Long Rak (LLR) rockshelter in Pang Mapha district, Mae Hong Son Province, northwest Thailand.. Radiocarbon dating shows these log coffins to date within the range of 1,960±30 cal. yr BP to 1,636±44 cal. yr BP.
Project description:In order to identify gene expression difference between marine and freshwater stickleback populations, we compared the transcriptomes of seven adult tissues (eye, gill, heart, hypothalumus, liver, pectoral muscle, telencephalon) between a marine population sampled from the mouth of the Little Campbell river in British Columbia (LITC) and a freshwater population (Fishtrap Creek, FTC) from northern Washington. For each population, the sampled individuals were the lab-reared progeny of a single pair of wild-caught parents.
Project description:Comparison of freshwater tolerant (accession CCAP 1310/196, origin Hopkins River Falls, Victoria, Australia) and strictly marine strain (accession CCAP 1310/4, origin San Juan de Marcona, Peru) of E. siliculosus under different salinites
