Article on a cytochrome P450 monooxygenase commonly used for negative selection in transgenic plants causing growth anomalies by disrupting brassinosteroid signaling.

This article reports the results from Chandra and XMM-Newton observations of a sample of 10 type 1 quasars selected to have unusual UV emission-line properties similar to those of PHL 1811.

This presentation discusses virtual reference services in libraries. The topics include virtual reference systems, with examples of what other institutions have adopted, collaborative virtual reference services with examples, and how reference librarians away from their desk and even off campus have developed new referencing services.

The article looks at antitumor activity using a matched pair of cell lines MDA-MB-231 cells that are estrogen-independent, estrogen receptor negative and MCF-7 cells, a cell line that is estrogen receptor (ER) positive. Those polyethers that contained a O-phenyl unit were able to significantly inhibit the non-estrogen sensitive cell line but were much less effective against the estrogen sensitive cell line; that is, the human breast cancer cell line MDA-MB-231 showed better test results for polymers derived from diols containing the O-phenyl moiety than the breast cancer cell line MCF-7, a well-characterized estrogen receptor positive control cell line.