Lysobacter enzymogenes produces an alkaline phosphatase which is secreted into the medium. The gene for the enzyme (phoA) was isolated from a recombinant lambda library. It was identified within a 4.4-kb EcoRI-BamH1 fragment, and its sequence was determined by the chain termination method. The structural gene consists of an open reading frame which encodes a 539-amino-acid protein with a 29-res...

We describe a PCR-based assay for determining c-erbB-2 oncogene amplification in breast cancer in which we use the TaqMan system. Two fluorogenic probes anneal to the target between primers for c-erbB-2 and beta-globin genes and contain both a reporter dye (6-carboxy-fluorescein) and a quencher dye (6-carboxy-tetramethyl-rhodamine). During the extension phase of the PCR cycle, the 5'-->3' exonu...

Photodynamic therapy (PDT) stands to benefit from improved approaches to real-time treatment monitoring. One method is to use activatable photosensitizers that can both induce cell death (via singlet oxygen) and monitor it (via caspase detection). Here, we report porphyrins as caspase-responsive Forster Resonance Energy Transfer (FRET) acceptors to organic fluorophore donors. Compared to porphy...

The lateral diffusion coefficients of various epidermal growth factor (EGF) receptor mutants with increasing deletions in their carboxy-terminal cytoplasmic domain were compared. A full size cDNA construct of human EGF receptor and different deletion constructs were expressed in monkey COS cells. The EGF receptor mutants expressed on the cell surface of the COS cells were labeled with rhodamine...

We report on strong coupling between surface-plasmon polaritons (SPP) and Rhodamine 6G (R6G) molecules, with double vacuum Rabi splitting energies up to 230 and 110 meV. In addition, we demonstrate the emission of all three energy branches of the strongly coupled SPP-exciton hybrid system, revealing features of system dynamics that are not visible in conventional reflectometry. Finally, in anal...

The passive mode locking of an argon-ion-pumped energy-transfer cw dye laser operating in the near infrared is reported. The dyes 1,1'-diethyl-4,4'-carbocyanine iodide and 1,1'-diethyl-2,2' -dicarbocyanine iodide were used separately to mode lock a gain medium comprising the dyes DCM and Rhodamine 700. Subpicosecond pulses were generated from 732 to 761 nm in a simple linear cavity, and pulses ...