, Volume 58, Issue 2, pp 137–153 | Cite as

Correlated changes of Balbiani ring expansion and secretory protein synthesis in larval salivary glands ofChironomus tentans

  • Walter Pankow
  • Markus Lezzi
  • Ingrid Holderegger-Mähling


Salivary glands of various stages of the last larval instar ofChironomus tentans were quantitatively analyzed with respect to the expansion of their Balbiani rings (B1, B2, B3) by a fast green staining procedure as well as to the rate of synthesis of their secretory proteins (S1, S2, S3) by a scintillation counting procedure of electrophoretic fractions. The extent of expansion of B1, B2 and B3 correlates positively with the rate of synthesis of S3, S2 and S1, respectively. With B1 and S3 these parameters undergo a parallel and developmentally specific change being rather depressed in intermolt, and particularly in diapausing animals.


Protein Synthesis Salivary Gland Developmental Biology Secretory Protein Scintillation Counting 
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Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • Walter Pankow
    • 1
  • Markus Lezzi
    • 1
  • Ingrid Holderegger-Mähling
    • 1
  1. 1.Institut für ZellbiologieEidgenössische Technische HochschuleSwitzerland

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