United States Biological is a primary brand for the Life Science Industry. We are committed to reducing the cost of research with value, integrity and a truly personal buying experience. We believe in answering all inquiries within a few hours of receipt. You always get to speak with humans (our rabbits are shy). Our technical support department is comprised of scientists with decades of experience. We will promptly and thoroughly answer your inquiries and enjoy helping guide you through protocols whether it be for our products or your personal research.