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  • molar
  • The addition of isopentenyladenosine within the first 12 hours after phytohemagglutinin at a concentration above 10 -6 molar results in inhibition, while lower concentrations (between 10 -7 and 10 -6 molar), added at 24 hours or later, have a stimulatory effect. (sciencemag.org)
  • Release
  • Phytohemagglutinin (PHA), an abundant vacuolar seed protein of the common bean (Phaseolus vulgaris), is a tetramer of two homologous polypeptides, PHA-E and PHA-L. The roots of bean seedlings release into the culture medium a cross-reacting lectin that is most closely related to PHA-E. Reverse-transcriptase polymerase chain reaction with root mRNA as template was used to identify PHA transcripts in the roots of bean seedlings. (plantphysiol.org)