Altogen Biosystems is a recognized producer and custom research organization for the pharmaceutical industry. Custom research products and other goods include xenografts, optimization of preclinical research, stable transfection of cells, IND applications and more. Dedicated to assisting researchers with state-of-the-art and efficient services, Altogen Biosystems endeavors to further modern clinical techniques. Visit the Altogen Biosystems website for colon xenograft models .