Month: August 2020

  • Human colon fibroblast tissue plasminogen activator

    A second generation tissue plasminogen activator (tPA), which has the clot-sensitive activation of plasminogen with potentially greater selectivity and (clot) specificity.  

  • Human chorionic gonadotropin

    A human hormone. In 1986, Mark Bogart discovered that elevated levels of human chorionic gonadotropin in pregnant women are correlated with babies (later) born with Down Syndrome. Hormones produced by the placenta and detected in the urine and blood of a pregnant woman. The gonad stimulating hormone from the embryo. A hormone produced by the…

  • Human artificial chromosomes (HAG)

    Chromosomes that have been synthesized (made) from chemicals that are identical to chromosomes within human cells.  

  • Hot Spots

    Sites in genes at which events, such as mutations, occur with unusually high frequency. An area on the surface of the skin that, when stimulated, causes a sensation of warmth. In the context of therapy technologists, the term “overlying treatment areas by two portal openings” is used to describe the process of exposing two portal…

  • Host vector (HV) system

    The host is the organism into which a gene from another organism is transplanted. The guest gene is carried by a vector (i.e., a larger DNA molecule, such as a plasmid, or a virus into which that gene is inserted) which then propagates in the host.  

  • Host cell

    A cell whose metabolism is used for growth and reproduction by a virus. Also the cell into which a plasmid is introduced (in recombinant DNA experiments).  

  • Homozygous

    In a diploid organism, a state where both alleles of a given gene are the same. Possessing identical genes from each parent for a particular trait. A genetic characteristic containing either two dominant or two recessive genes. Having two identical versions of a specific gene. Having two identical alleles of a gene at corresponding loci…

  • Homotropic enzyme

    An allosteric enzyme whose own substrate functions as an activity modulator.  

  • Homologous protein

    A protein having identical functions and similar properties in different species. For example, the hemoglobins that perform identical functions in the blood of different species.  

  • Hollow fiber separation (of proteins)

    The separation of proteins from a mixture by means of”straining” the mixture through hollow, semipermeable fibers (e.g., polysulfone fibers) under pressure. The hollow fibers are constructed in such a way that they have very tiny (molecular size) holes in them. In this way large molecules are retained in the original liquid while smaller molecules, which…