Stephen Karr

 StephenJ. Karr

Stephen J. Karr

  • Courses1
  • Reviews1

Biography

Ventura College - Biology


Resume

  • 8648231

    The disclosure provides a method for increasing plant yield relative to corresponding wild type plants comprising modulating expression in a plant of a nucleic acid encoding WAKL14 polypeptide or homologue thereof

    and selecting for plants having increased yield or growth on a nutrient deficient substrate. In one embodiment

    the modulated expression is effected by introducing a genetic modification in the locus of a gene encoding a WAKL14 polypeptide or a homologue thereof.\n\n

    us

    Wall-associated kinase-like polypeptide mediates nutritional status perception and response

    Zhenbiao Yang

    International Society for Extracelluar Vesicles- ISEV

    World Future Society-WFS

    American Society for Plant Biologists-ASPB

    International Society for Horticultural Science- ISHS

    International Society for Seed Science-ISSS

    American Chemical Society

  • 8168861

    The disclosure shows that loss-of-function mutations of SRF6 (At1g53730) and SRF7 (At3g14350) (srf6-1 and srf7-1) reduced cellulose synthase A (CesA) gene expression

    had reduced hypocotyl elongation in the dark similar to the CesA6 mutant PROCUSTE1 (prc1-1

    At5g64740) and had reduced cellulose deposition as observed by Fourier Transform Infrared (FT-IR) microspectroscopy. Other insertional mutants of SRF7 (srf7-2 and srf7-3)

    which truncate the C-terminus

    showed an increase in CesA gene expression that may be caused by the elimination of an auto-inhibitory region and thus generates a constitutively active mutant. Full-length overexpression of SRF7 (35S:SRF7) exhibited increased CesA gene expression and also had increased glycosidic bonds and carbohydrate bonds indicative of increased cellulose. This increase in cellulose production without a deleterious increase in pectin would be of great interest to bioenergy producers interested in cellulolytic ethanol production. \r\n\r\n

    us

    Compositions and methods for increasing cellulose production

    Zhenbiao Yang

  • 2014

    Ventura County Rescue Mission

    American Red Cross

    Volunteer

    Community Emergency Response Team (CERT)

    Molecular Biology

    Agriculture

    Cell Biology

    Protein Purification

    Six Sigma

    Project Management

    HPLC

    ELISA

    Gel Electrophoresis

    Molecular Cloning

    Lean Manufacturing

    qPCR

    PCR

    DNA Extraction

    Genomics

    Bioinformatics

    Data Analysis

    Genetics

    DNA

    Cell

    Karr

    Stephen

    Ventura County Community College District

    University of California

    Riverside

    Earth NERDS

    Bayer Crop Science

    Monsanto

    Ventura

    CA

    I taught biology lab (BIOL V01L) and biotechnology (BIOL V30).

    Adjunct Professor

    Ventura County Community College District

    Riverside

    CA

    Developed a novel method to determine receptor-like kinase function in the model plant species

    Arabidopsis. My work in this area has lead to 2 patents on the production of increased cellulose and the perception of nutritional status in plants . One patent is still pending.

    Research Associate- Plant Cell

    Molecular

    Developmental Biology

    University of California

    Riverside

    Saint Louis

    MO

    PS (Product Supply) Expert is a role in the PS Expert program. A technical career path within Product Supply at Bayer.

    PS Expert

    Bayer Crop Science

    Saint Louis

    MO

    This is a new role for me in the Innovation Engineering group based in Saint Louis

    MO. I plan to continue working on projects related to seed quality improvement.

    Senior Seed Technology Research Scientist

    Bayer Crop Science

    Oxnard

    CA

    My position was responsible for developing high-throughput seed quality testing platforms for vegetable seeds as well as field validation of current seed quality tests.

    Seed Technology Research Associate

    Monsanto

    Saint Louis

    MO

    Since 2007 we have been working to develop clean energy solutions and products. We have been looking for angel investors and government grants to get some start up capital.

    Co Founder

    Earth NERDS

    Oxnard

    CA

    In this role I developed new value added seed technologies to improve seed performance for our customers. Tested and trialed these technologies across North and South America. Developed new methods for seed quality testing to increase their speed and accuracy.

    Molecular Seed Technology Scientist

    Monsanto

    Receptor-like kinases (RLKs) form a large monophyletic gene family of approximately 600 members in plants (Shiu and Bleecker

    Plant receptor-like kinase gene family: diversity

    function and signaling. Science STKE

    re22

    2001; and Shiu and Bleecker

    Receptor-like kinases from Arabidopsis form a monophyletic gene family related to animal receptor kinases. Proceeding of the National Academy of Science U.S.A. 98:10763-10768

    2001). They consist of proteins that contain a single extracellular domain that is thought to be the site of ligand binding

    connected to a single kinase domain

    via a single transmembrane domain. Upon ligand binding the kinase domain is capable of generating a phosphorylation signaling cascade. Because of the sheer size of this gene family and of the potential functional redundancy among closely related gene family members

    not much is known about the function of many of these important signaling genes. What little that was known shows that RLKs have many diverse roles in plants such as

    hormone perception

    plant defense

    plant development and cell growth.\n\n

    us

    Methods for the screening of novel functions of receptor like kinases

    Zhenbiao Yang

  • 2011

    FOOD Share of Ventura County

  • 2007

    Certificate

    Grant Writing

    California State University-San Bernardino

  • 2002

    Doctor of Philosophy (Ph.D.)

    Cell

    Molecular

    Developmental Biology

    NSF- East Asia & Pacific Summer Institutes (China)

    University of California

    Riverside

  • 2000

    Master's degree

    Biological Sciences

    Omicron Theta Epsilon- Biology Honor Society

    \nGolden Key International Honour Society

    \nPhi Kappa Phi Honor Society

    California State University-Chico

    Modern Techniques of HPLC

    Agilent Technologies

    Monsanto Company

    Six Sigma Green Belt

    Multivariate Data Analysis- Level 2

    CAMO Software Inc.

    Monsanto Company

    Lean Practitioner

    Six Sigma Black Belt

    Monsanto Company