Our Story

We want to make a difference to lives, to improve them by harnessing our technology in order to help accelerate research and lower costs in the development of therapeutic drugs, vaccines and diagnostics.

It all started in Prof. Lomonossoff’s lab at the John Innes Centre as research being conducted by Prof. George Lomonossoff and Dr Frank Sainsbury. It soon developed into a viable process for producing useful proteins and is today Leaf Expression Systems, a growing company with the capability of producing products for the life sciences and agri industries.


  • 2007 - 2012

    Funded by BBSRC, John Innes Centre researchers Professor George Lomonossoff and Dr Frank Sainsbury develop Hypertrans®, a plant-based system for producing useful proteins. 2008 Hypertrans®, research is published in the journal Plant Physiology. 2009 A user-friendly Hypertrans® vector system, developed by Professor George Lomonosoff, Dr Frank Sainsbury and Dr Eva Thuenamann, is launched. 2012 Professor George Lomonosoff wins the BBSRC innovator of the year award for his work with Dr Frank Sainsbury on Hypertrans®

  • 2015

    Funding for Leaf Expression Systems secured through BBSRC

  • 2016 - June

    Building work on the Leaf Expression Systems facility commences

  • 2016 - August

    Appointment of Dr Steven Powell as Executive Director and Phil Cater as Operations Director

  • 2017

    Leaf Expression Systems facility officially opened by Science Minister Jo Johnson MP.
    Grants are awarded by SBRI , Horizon 2020 and UKVRDN

  • 2018

    Simon Saxby appointed as CEO
    Signed first commercial contracts

  • 2019

    Leaf Expression Systems launch first line of Hypertrans®products research products online.
    Plant Bioscience Ltd transfers control of Hypertrans®