helper factor

helper factor

a protein produced by helper T lymphocytes that stimulates proliferation of and antibody production by other lymphocytes.
Mentioned in ?
References in periodicals archive ?
They also saw something completely unexpected: a "finger" of the helper factor protein that pokes into the enzyme's active center.
Roeder's initial work with these systems, leading to a greater understanding of gene regulation, included the identification of polymerase-associated helper factors, called the general transcription machinery, and the definition of the first of many hundreds of gene-specific DNA-binding regulatory proteins, called activators and repressors, that control the rate of transcription and effect major cell fate decisions.