103. 



C. J. MASTERS and R. S. HOLMES. 1975. HAEMOGLOBIN, ISOENZYMES AND 



TISSUE DIFFERENTIATION 



North-Holland, Amsterdam, etc.; Amer. Elsevier, New York. Frontiers of Biology 42. 

 XIV, 308 pp., 92 figs., 23 tabs., subject index. $ 32.95, Dfl. 79.00 



Contents: 1. Introduction; 2. Haemoglobin and evolution; 3. Isoenzymes and phylo- 

 geny; 4. Haemoglobin synthesis and ontogeny; 5. Isoenzymes and ontogeny; 

 6. Turnover of isoenzymes; 7. Micro-localization of isoenzymes; 8. General conclusions 



This well-written book by two Australian authors provides a selective compilation of 

 recent results with regard to haemoglobins and (mainly) multiple-locus isoenzymes, 

 together with extensive comment on the role of protein multipUcity in biology. These 

 subjects are considered for their own intrinsic interest as well as for their considerable 

 practical applications. Because isoenzymes are powerful tools in its analysis, tissue 

 differentiation is the connecting thread, but evolutionary aspects are integrated through- 

 out. 



Chs.6 and 7 deal with the extremely important aspects now commonly called "enzyme 

 realisation", i.e. those relating to the functioning of enzymes in the real cell rather than 

 the test tube. 



The book is well produced and illustrated and has a bibliography of 22 pages in small 

 print. 



Dissertations 



104. 



O. H. J. DESTREE. 1975. HISTONES IN DEVELOPMENT OF XENOPUS LAEVIS 



M.D. thesis, Univ. of Amsterdam. 1 14 pp., 24 figs., 1 1 tabs. 



Based on 3 previous publications and new data; histone patterns in chromatin from 

 cleavage till tailbud embryos, with emphasis on early stages; all major fractions present 

 from 16-cell stage onwards, but additional basic proteins at blastula stage; new chromatin 

 model; discussion of histone hterature. 



105. 



R. LAFONT. 1975. ASPECTS BIOCHIMIQUES DE LA DIFFERENCIATION DES DIS- 



QUES IMAGINAUX ALAIRES DES LEPIDOPTERES 



Ph.D. thesis, Paris. Publ. du Lab. de Zool., Ecole Norm. Super. No. 5. 157 pp., 70 figs. 



(mimeographed), 3-page English summary 



Imaginal wing discs of Pieris brassicae in last larval instar and pupa; nucleic acid and 

 protein metabolism; wing pigmentation; hormonal control (part, haemolymph ecdysone 

 levels). 



106. 



H. MEISSL. 1975. DER EINFLUSS VON PROLAKTIN UND SOMATOTROPIN AUF 



DEN LIPIDSTOFFWECHSEL WAIIREND DER METAMORPHOSE DES KRALLEN- 



FROSCHES XENOPUS LAEVIS DAUDIN 



Ph.D. thesis, Karlsruhe. 54 pp., 22 figs., 1 tab. (mimeographed) 



Changes in hpid amounts and in hormonal regulation of lipid metaboUsm during 

 metamorphosis. 



210 



