Die Chloroplastendrehung beiMougeotia

Summary By means of partial illumination with small spots of monochromatic light, polarized obliquely to the cell axis, we could demonstrate that the phytochrome molecules inMougeotia are oriented in a spiral pattern around the cell surface. The lines of this spiral form an angle of about 45^o with the cell axis. The degree of exactness of this orientation has been discussed.

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Mit 7 Textabbildungen

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Herrn Professor Dr.E. Heitz zum 70. Geburtstag.     

Chromosomal localization of a human myosin heavy-chain gene by in situ hybridization

Summary A cloned rabbit heart muscle myosin heavy-chain cDNA was hybridized in situ with human metaphase chromosomes. The probe was known to have sequence homology with human genomic heavy-chain DNA. Only one site in the human haploid karyotype was labeled with the cDNA, and this site was found on the short arm of chromosome 17. The localization of autoradiographic grains suggests a subregional assignment of the myosin heavy-chain locus to 17p 1,2-pter.