Most of her work centered on amylase , a starch enzyme , most notably finding a method for purifying crystalline porcine pancreatic amylase .
Maria was in a wheel chair due to muscular disability .
Most of Maria 's work centered on amylase , a starch enzyme , most notably finding a method for purifying crystalline porcine pancreatic amylase .
Maria was in a wheel chair due to muscular disability .