What if we could reinvent photosynthesis itself? GigaCrop founder and CEO Chris Eiben has a mission to dramatically increase crop yields by redesigning one of biology's most fundamental processes.

With half of Earth's habitable land already dedicated to agriculture and growing demands for food, fiber, and materials, we face a critical choice: convert more natural landscapes to farmland or make existing farmland drastically more productive.

The problem lies with Rubisco, the enzyme at the heart of photosynthesis. Despite millions of years of evolution, Rubisco remains frustratingly inefficient - it's slow and frequently mistakes oxygen for carbon dioxide, forcing plants to waste energy correcting these errors. Rather than trying to improve Rubisco itself (a challenge that has consumed billions in research funding), GigaCrop is building entirely new biochemical pathways using faster enzymes that don't make these mistakes.

The potential impact is staggering. In full sunlight, plants receive more photons than they can use - the biochemical process of carbon conversion becomes the bottleneck. By addressing this fundamental limitation, GigaCrop could enable crops to produce significantly more yield on the same land, transforming agriculture while preserving natural ecosystems.

Connect with Chris if you're excited about plant engineering or bringing game-changing technologies to market.

Linkedin: https://www.linkedin.com/in/chris-eiben/

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The solution to plastic waste looks different depending on where you stand in the world. While Northern Hemisphere biotech approaches to plastic recycling focus on high-temperature enzymes designed to regenerate plastic monomers (which works when you produce lots of plastic), Cesar's lab has engineered a completely different solution. Starting with microorganisms from Antarctica, his team uses AI and deep learning to design enzymes that work efficiently at low temperatures - not to recycle plastic into more plastic, but to transform it into valuable fragrances and other products that actually have market demand in Latin America.

The conversation weaves between technical enzyme design challenges and broader themes of democratizing biotechnology across the Global South. During the COVID pandemic, when reagent shortages hit Latin America particularly hard, Cesar co-founded initiatives to produce essential molecular biology enzymes locally. This experience crystallized his vision of combining open science with practical innovation - making biotechnology tools accessible while simultaneously developing commercial applications.

Follow Cesar's work at the Institute for Biological and Medical Engineering ath the Pontificia Universidad Católica de Chile.

@cxarramirez

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What if we could secure critical supply chains through bioengineering? What if the vaccines protecting millions worldwide didn't require harvesting 10,000 trees annually from Chilean mountains? Maria Astolfi is tackling this exact challenge through groundbreaking work with P450 enzymes.

Growing up surrounded by biodiversity shaped Maria's unique perspective on biotechnology. After co-founding the Amazon's first synthetic biology lab and working at Ginkgo Bioworks, she now conducts research in UC Berkeley's Jay Keasling laboratory. Her mission? Solving one of biomanufacturing's most persistent bottlenecks – engineering the notoriously difficult P450 enzymes that are crucial for producing complex natural products.

The stakes couldn't be higher. QS-21, a critical vaccine adjuvant, costs up to $200,000 per gram due to its complex extraction from Chilean trees. Beyond the environmental damage, this extractive approach creates volatile supply chains for essential medicines. Maria's innovative combination of machine learning and high-throughput robotics has already yielded a remarkable 3x improvement in enzyme activity – just the beginning of what's possible.

What makes Maria's vision truly transformative is how it reconnects biotechnology with biodiversity. By focusing first on this high-value target, she's creating infrastructure that could eventually transform production of countless natural products.

Listen to this episode for a glimpse into a future where advanced biotechnology and biodiversity protection go hand in hand.

00:00 Introduction to Vaccine Adjuvants and Climate Biotech
00:19 Welcome to the Climate Biotech Podcast
00:46 Meet Maria: From the Amazon to Biotech
01:50 Maria's Early Inspirations and Career Path
04:24 The Journey to Ginkgo Bioworks
10:49 Challenges and Innovations in Biomanufacturing
13:16 The Importance of Cytochrome P450 Enzymes
16:38 Scaling Sustainable Biomanufacturing
21:21 The Broader Impact of Biomanufacturing
25:25 Future Visions and Final Thoughts
33:33 Rapid Fire Questions and Closing Remarks

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