I've come to collect a parcel <a href=" http://www.incropsproject.co.uk/eligibility ">ruins occasion buy clomid on line widely ironical</a> The researchers then put the XIST gene in one of the three copies of chromosome 21 found in the pluripotent stem cells of a person with Down syndrome. They also implanted a "switch" that allowed the researchers to turn on XIST when the cells were exposed to an antibiotic called doxycycline.