Housekeeping genes
Genes whose protein products are required for cellular maintenance or metabolism.
Human artificial chromosome (HAC)
A vector used to hold large DNA fragments
Human chorionic gonadotropin (hCG)
A hormone produced by the placenta during a pregnancy. Measurement of this hormone is the basis of pregnancy tests. An unusually high level of this hormone in the second trimester is one reason that further testing for Down syndrome may be recommended. An unusually low level may indicate a rare chromosome abnormality called trisomy 18.
Human gene therapy
See: gene therapy
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