Hubert C, Cedard L
Nucleic Acids Res. 1975 Oct;2(10):1903-10. doi: 10.1093/nar/2.10.1903.
A messenger activity for HPL was identified in normal human term placentas. The mRNA was translated in rabbit reticulocyte cell-free system. The HPL synthesized was quantified by a specific immunoprecipitation and further identified by electrophoresis on sodium dodecyl sulfate polyacrylamide gel. The HPL synthesized in the reticulocyte lysate exhibited a molecular weight between 20,000 and 22,000 daltons similar to the active hormone. The messenger RNA activity for HPL corresponded to a sedimentation coefficient of 11-12 S. Furthermore the messenger activity for HPL was preferentially associated with membrane bound polyribosomes than with free polyribosomes.
在正常足月人胎盘中鉴定出了人胎盘催乳素(HPL)的信使活性。该信使核糖核酸(mRNA)在兔网织红细胞无细胞系统中进行翻译。通过特异性免疫沉淀对合成的HPL进行定量,并通过十二烷基硫酸钠聚丙烯酰胺凝胶电泳进一步鉴定。在网织红细胞裂解物中合成的HPL表现出与活性激素相似的20,000至22,000道尔顿的分子量。HPL的信使核糖核酸活性对应于11 - 12 S的沉降系数。此外,HPL的信使活性优先与膜结合多核糖体相关,而非游离多核糖体。