Invitrogen Corporation

Qiagen Gaithersburg Inc.

Becton Dickinson and Company Limited

Life Technologies Corporation

Jiulin Xia

Gulilat Gebeyehu

Joel A Jessee

David M Schuster

Jonathan Matthew Miller

Carl Edens

Wu-Bo Li

Nadia P Allen

Richard L Mantefuel

David Schuster

An automated method for assuring sample adequacy. The method includes providing a sample in a testing container, activating an illumination source to pass an illumination beam through the testing container and into the sample, and detecting an intensity of an emitted beam. The emitted beam includes at least a portion of the illumination beam that has been scattered by the sample. The method also includes generating a sample turbidity measurement based on the intensity of the emitted beam, and determining, based on the sample turbidity measurement, an adequacy of the sample to provide accurate results in a primary test.

Ensuring sample adequacy using turbidity light scattering techniques

A sample adequacy measurement system having sample tubes and a housing having a receptacle to receive the sample tubes. The housing has sample adequacy measurement stations that each have a light source and a sample detector. The light source generates an illumination beam directed into one of the sample tubes. The sample detector is positioned along the tube, and receives at least a portion of the illumination beam scattered by turbidity in the sample tube. The detector is positioned at the end of an emitted beam path that extends in a plane that is perpendicular to the vertical direction and is oriented at a non-perpendicular angle with respect to the longitudinal axis of the sample tube unit. This reduce the likelihood that the emitted beam will pass through a damaged portion of the respective one of the sample tubes by passing the light through a protected portion of the tube.

Sample adequacy measurement system having a plurality of sample tubes and using turbidity light scattering techniques

The present invention is directed to compositions and methods for enhancing synthesis of nucleic acid molecules, particularly GC-rich nucleic acid molecules. Specifically, the invention provides compositions comprising one or more nitrogen-containing organic compounds having a formula selected from the group consisting of formula I and formula II (or salts or derivatives thereof), preferably 4-methylmorpholine N-oxide or betaine (carboxymethyltrimethylammonium), and further comprising one or more compounds selected from the group consisting of proline and an N-alkylimidazole compound, and more preferably proline, 1-methylimidazole or 4-methylimidazole. The invention further relates to methods for enhanced, high-fidelity synthesis of nucleic acid molecules, including via amplification (particularly PCR), reverse transcription, and sequencing methods. The invention also relates to nucleic acid molecules synthesized by these methods, to fragments or derivatives thereof, and to vectors and host cells comprising such nucleic acid molecules, fragments, or derivatives. The invention also relates to kits for synthesizing, amplifying, reverse transcribing or sequencing nucleic acid molecules comprising one or more of the compositions of the invention.

Methods for producing polypeptides through enhanced synthesis of encoding nucleic acid molecules

The present invention is directed to compositions and methods for enhancing synthesis of nucleic acid molecules, particularly GC-rich nucleic acid molecules. Specifically, the invention provides compositions comprising one or more nitrogen-containing organic compounds having a formula selected from the group consisting of formula I and formula II (or salts or derivatives thereof), preferably 4-methylmorpholine N-oxide or betaine (carboxymethyltrimethylammonium), and further comprising one or more compounds selected from the group consisting of proline and an N-alkylimidazole compound, and more preferably proline, 1-methyliimidazole or 4-methylimidazole. The invention further relates to methods for enhanced, high-fidelity synthesis of nucleic acid molecules, including via amplification (particularly PCR), reverse transcription, and sequencing methods. The invention also relates to nucleic acid molecules synthesized by these methods, to fragments or derivatives thereof, and to vectors and host cells comprising such nucleic acid molecules, fragments, or derivatives. The invention also relates to kits for synthesizing, amplifying, reverse transcribing or sequencing nucleic acid molecules comprising one or more of the compositions of the invention.

Compositions and methods for enhanced synthesis of nucleic acid molecules

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Germantown, MD, United States of America

Jiulin Xia