| 摘要 |
<p>A monoclonal factor that has an inhibitory effect on lymphocyte plasma membrane 5 min -nucleotidase, has a negative effect on immunoglobulin production, and has a molecular weight of 44,000 daltons +/- 7,000, as determined by gel filtration and/or polyacrylamide gel electrophoresis; cell lines, especially continuous hybrid and transformed beta -lymphocyte cell lines that are capable of producing the factor; and pharmaceutical preparations comprising the factor.</p> |
