Our work studies the interplay of biomolecules – proteins, sugars and their modifications. Synthetic Biology’s development at the start of this century may be compared with Synthetic OrganicChemistry’s expansion at the start of the last; after decades of isolation, identification, analysis and functionalconfirmation, the future logical and free-ranging redesign of biomacromolecules offers tantalizing opportunities. This lecture will cover past and emerging areas in our group in the chemical manipulation of biomolecules withan emphasis on new bond-forming and bond-breaking processes compatible with biology.(i) New methods: the development of precise methods that may be applied to biology at a post-translationallevel, generating minimal ‘scars’ or ‘traces’ (ideally ‘trace’-less), could allow broad control of function. Thedevelopment of chemo- and regio-selective methods with potential to post-translationally ‘edit’ biology in thisway, applied under benign conditions to redesign and reprogramme the structure and function of biomolecules,will be presented. (ii) ‘Synthetic Biologics’ and their applications: biomimicry; functional recapitulation; effector[drug/agrochemical/gene/radio-dose] delivery; selective protein degradation; inhibitors of pathogeninteractions; non-invasive presymptopmatic disease diagnosis; probes and modulators of in vitro and in vivofunction illustrate possible resulting technologies.