Comprehensive Guide to the Branches and Applications of Biotechnology

General Definition and Functional Scope of Biotechnology

Biotechnology is defined as a field that utilizes biological systems, living organisms, or their derivatives to create or modify products and processes. Its objective is to improve various aspects of human existence, including health, environment, industry, and technology. According to the Convention on Biological Diversity (CDB) formulated in 1992, biotechnology is explicitly defined as any technological application that uses biological systems and living organisms or their derivatives for the creation or modification of products or processes for specific uses.

Biotechnology is categorised into several branches, often represented by different colours, depending on their specific scientific, environmental, medical, agricultural, industrial, and technological applications. These branches collectively contribute to environmental sustainability, the improvement of human and animal health, the increase of agricultural production, the optimization of clean industrial processes, the innovation of food production, the promotion of ethical and responsible science, and the development of new technologies and specialized knowledge.

Black Biotechnology (Biotecnología Negra)

Black biotechnology is concerned with applications related to bioterrorism, biological warfare, and the use of organisms or toxins to cause intentional harm to human health, plants, animals, or entire ecosystems. This branch involves highly sensitive and dangerous activities focused on the destructive potential of biological agents.

Specific examples of agents and activities within this category include the use of Anthrax (Bacillus anthracis), Smallpox (Variola virus), Botulinum toxin, and Ricin (Ricinus communis). It also encompasses the engineering of pathogens, the creation of biological aerosols, and the development of biological weapons. Other areas of concern include agro-biotechnological sabotage, the intentional creation and spread of antimicrobial resistance, and the deliberate dissemination of disease vectors.

Gray Biotechnology (Biotecnología Gris)

Gray biotechnology encompasses applications focused on environmental protection, waste management, and the remediation of pollutants. Its primary goal is to maintain and restore the health of the natural environment through biological means.

Examples of gray biotechnology applications include the bioremediation of soils contaminated with petroleum, the biological treatment of wastewater, and the biodegradation of plastics. It involves using biofilters for toxic gases, the composting of organic waste, and phytoremediation using hyperaccumulator plants. Additionally, it covers the degradation of pesticides and herbicides, the bioleaching of heavy metals, the production of biogas from waste materials, and the integral management of urban solid waste.

White Biotechnology (Biotecnología Blanca)

White biotechnology, also known as industrial biotechnology, relates to applications in industrial and environmental sectors aimed at producing materials, energy, and chemicals through sustainable biotechnological processes. It focus on creating cleaner and more efficient manufacturing pathways.

Notable examples in this field include the production of second-generation ethanol and the production of citric acid. It involves the use of industrial enzymes such as amylases, proteases, lipases, and cellulases. The branch is responsible for developing bioplastics, such as PHA and PLA, and the production of biological hydrogen. Other applications include the creation of biosurfactants for industrial cleaning, the use of fermentation for butanol production, the synthesis of vitamins like $B_{12}$ and riboflavin, biocatalysis in chemical synthesis, and the biological treatment of industrial emissions.

Purple Biotechnology (Biotecnología Morada)

Purple biotechnology deals with the legal, ethical, and biosafety aspects of biotechnologies. This branch ensures the responsible use of living organisms and addresses the societal implications of biological research and its commercialization.

Examples of purple biotechnology include the management of biotechnological patents and intellectual property rights, the establishment of research ethics committees, and the study of bioethics in genetic editing. It involves the creation of biosafety laws and the regulation of genetically modified organisms (GMOs). Furthermore, it covers informed consent in clinical biotechnology, animal welfare norms in research, the assessment of biotechnological risks, and legislation regarding access to genetic resources.

Blue Biotechnology (Biotecnología Azul)

Blue biotechnology refers to applications in marine and aquatic environments for the sustainable use of marine resources and organisms. This field explores the vast biological potential of the oceans and freshwater bodies.

Examples of blue biotechnology include the farming of Atlantic salmon (Salmo salar) and white shrimp (Litopenaeus vannamei). It involves the production of alginates from algae and omega-3 fatty acids from microalgae. Scientists in this field engage in the bioprospecting of compounds in marine sponges and the production of agar and carrageenan. Other applications include the genetic improvement of fish, the development of vaccines for diseases in aquaculture, the production of corals for reef restoration, and the extraction of marine enzymes such as proteases and lipases.

Green Biotechnology (Biotecnología Verde)

Green biotechnology is applied to agriculture and plants to improve crops, increase production volumes, and promote environmental sustainability. It is essential for food security and the reduction of the agricultural footprint.

Key examples include the development of Bt Corn (insect-resistant), Golden Rice (enriched with Vitamin A), and herbicide-tolerant soy. It also covers the production of papaya resistant to the ringspot virus and gene editing in wheat using CRISPR technology. This branch facilitates the production of biofertilizers using organisms like Rhizobium and Azospirillum, as well as vegetable tissue culture via micropropagation. Additionally, it produces transgenic plants tolerant to drought or salinity, biological pest control mechanisms using Bacillus thuringiensis, and biopesticides based on fungi and bacteria.

Yellow Biotechnology (Biotecnología Amarilla)

Yellow biotechnology focuses on applications in food processes, specifically the production, preservation, and improvement of food and beverages. It is one of the oldest forms of biotechnology, traditional yet highly innovated by modern science.

Examples of yellow biotechnology include the production of yogurt via lactic fermentation, aged cheeses, artisanal bread using yeasts, and fermented beverages such as beer and wine. It also includes the production of vinegar through acetic fermentation. Modern applications involve the use of probiotics like Lactobacillus and Bifidobacterium, enzymes for the clarification of juices, and the production of lactic acid. It also relates to food preservation using starter cultures, the production of natural flavorings, and the creation of enriched functional foods containing omega-3, fibers, and antioxidants.

Gold Biotechnology (Biotecnología Dorada)

Gold biotechnology, also referred to as bioinformatics or nanobiotechnology, focuses on the intersection of biological systems and digital or nanotechnology. This branch is highly data-driven and technological.

Specific examples include next-generation sequencing (NGS), the analysis of genomic big data, and computer-aided drug design. It involves the use of nanoparticles for targeted drug delivery and the creation of biosensors based on nanotechnology. Advanced research includes the molecular simulation of proteins, AI-assisted genetic editing, and in silico diagnosis. Furthermore, gold biotechnology explores the use of nanobots for medical purposes and the development of algorithms to predict protein structures.

Red Biotechnology (Biotecnología Roja)

Red biotechnology is dedicated to medicine and human health, focusing on the prevention, diagnosis, and treatment of diseases to improve life quality. This is one of the most commercially significant branches of biotechnology.

Examples of red biotechnology include the production of recombinant insulin, various vaccines (using mRNA, viral vectors, or subunits), and monoclonal antibodies. It encompasses therapies such as gene therapy, the use of stem cells in regenerative medicine, and molecular diagnostics like PCR, qPCR, and ELISA. This field also pursues genetic editing for hereditary diseases, the production of interferons and growth factors, the 3D culture of tissues and organs, and modern cancer immunotherapy.

Brown Biotechnology (Biotecnología Marrón)

Brown biotechnology is applied to veterinary medicine and animal health. Its goals are to improve animal welfare, prevent diseases, and increase animal productivity in a sustainable manner.

Applications include the development of veterinary vaccines for diseases like foot-and-mouth disease (aftosa), rabies, and parvovirus. It involves the molecular diagnosis of animal diseases and the use of probiotics for animal intestinal health. In terms of productivity, it covers animal genetic improvement through assisted selection, the production of veterinary antibiotics, and the use of artificial insemination and reproductive biotechnology. Other areas include gene therapy in animals, the identification of biomarkers for animal welfare, the creation of biotechnological products for animal nutrition, and the culture of skin and tissues for animal regeneration.

Cross-cutting Examples and Importance in Daily Life

Biotechnology is not limited to laboratories; it is present in everyday life through various products and services. Common examples include life-saving medications like insulin and vaccines, and common fermented foods such as yogurt, bread, and cheese. It provides sustainable energy sources via biofuels like bioethanol, biogas, and biodiesel. On the dinner table, it provides improved crops that are more resistant and nutritious. Furthermore, it aids in the bioremediation of contaminated environments, the molecular diagnosis of diseases, and the genetic improvement of animals for both health and production.