Glucose-6-phosphate dehydrogenase in the pentose phosphate pathway is localized in vanadocytes of the vanadium-rich ascidian, Ascidia sydneiensis samea T. Uyama, K. Yamamoto, K. Kanamori and H. Michibata 441
Immunolocalization of vacuolar-type H+-ATPase in the yolksac membrane of tilapia (Oreochromis mossambicus) larvae J. Hiroi, T. Kaneko, K. Uchida, S. Hasegawa and M. Tanaka 447
Developmental sequence of chloride cells in the body skin and gills of Japanese flounder (Paralichthys olivaceus) larvae J. Hiroi, T. Kaneko, T. Seikai and M. Tanaka 455
Genetics
Comparative analysis of glucosephospate isomerase, lactate dehydrogenase and malate dhydrogenase isozymes in 9 cyprinid species from Italy S. Manaresi, B. Matovani and F. Zaccanti 461
Sex differences in polymorphism and expression of AAT-1 in the Hiroshima population of Buergeria buergeri (Anura, Rhacophoridae) S. Atsumi, S. Ohta and M. Sumida 469
Cell Biology
Interaction of an overexpressed -tubulin with microtubulesin vivo and in vitro M. Kofron, E. Nadezdina, A. Vassilev, J. Matuliene, R. Essner, J. Kato and R. Kuriyama 477
Morphology
Pigment cells representing polychromatic colony color in Botrylloides simodensis (Ascidiacea, Urochordata): Cell morphology and pigment substances E. Hirose, T. Yoshida, T. Akiyama, S. Ito and Y. Iwanami 489
Biochemistry
Proteolytic activation of tissue-type plasminogen activator by the culture media of mouse cancer cells H. Matsui, J. Ohnishi and T. Takahashi 499
Mass spectrometric analysis of phosphoserine residues conserved in the catalytic domain of membrane-bound guanylyl cyclase from the sea urchin spermatozoa H. Furuya, K. Yoshino, T. Shimizu, T. Mantoku, T. Takeda, K. Nomura and N. Suzuki 507
Developmental Biology
Development-dependent expression of cathepsins D and E in various rat tissues, with special reference to the high expression of cathepsin E in fetal liver T. Kageyama, M. Tatematsu, M. Ichinose, N. Yahagi, K. Miki, A. Moriyama and S. Yonezawa 517
Effects of ovariectomy and prolactin on mammary gland expressions of transforming growth factor and epidermal growth factor receptor mRNAs in mice H. Nagasawa, Y. Ikezaki and K. Yamamoto 525
Fibroblast growth factor may regulate the initiation of oocyte growth in developing ovary of the medaka, Oryzias latipes A. Watanabe, E. Kobayashi, T. Ogawa and K. Onitake 531
Mitotic asters separate, although chromosomes do not separate at slightly acidic pHi in the fertilized egg of the sea urchin, Hemicentrotus pulcherrimus K. Watanabe, M.S Hamaguchi and Y. Hamaguchi 537
Mesodermal cell differentiation in echinoid embryos derived from the animal cap recombined with a quartet of micromeres T. Minokawa and S. Amemiya 541
Expression of cyclophilin during the embryonic development of the sea urchin K. Ohta and T. Nakazawa 547
Monoclonal antibodies against differentiating mesenchyme cells in larvae of the ascidian Halocynthia roretzi G.J. Kim and H. Nishida 553
Reproductive Physiology
Effects of environmental conditions and aging on eupyrene sperm movement in male adults of Polygonia c-aureum (Lepidoptera:Nymphalidae) S. Hiroyoshi and J. Misuhashi 561
Endocrinology
Augmentation of prolactin release by -melanocyte stimulating hormone is possible mediated by melanocortin 3-receptors in the mouse anterior pituitary cells Y. Morooka, S. Oomizu, S. Takeuchi and S. Takahashi 567
Insulinlike growth factor-I and its receptor in mouse pituitary glands J. Honda, S. Takeuchi, H. Fukamachi and S. Takahashi 573
Unpaired ultimobranchial glands of the African lungfish, Protopterus dolloi Y. Shinohara-Ohtani and Y. Sasayama 581
Taxonomy and Phylogeny
A new species of Microporella (Bryozoa, Cheilostomata) from Alaska T. Suwa, M.H. Dick and S.F. Mawatari 589
Mitinokuidrilus excavatus n.g., n.sp., a marine tubificid (Oligochaeta) with a unique mode of reproduction Y. Takashima and S.F. Mawatari 593
Characterization of a highly repeated DNA family in Tapetinae species (Mollusca Bivalvia: Veneridae) M. Passamonti, B. Mantovani and V. Scali 599
Genetic divergence among Southeast and East Asian polulations of RanaLimnocharis (Amphibia: Anura), with special reference to sympatric cryptic species in Java M. Toda, M. Matsui, M. Nishida, and H. Ota 607
Geographical differentiation in a Japanese stream-breeding frog, Buergeria buergeri, elucidated by morphometric analyses and crossing experiments H. Ueda, Y. Hasegawa and J. Marunouchi 615
-tubulin with microtubulesin vivo and in vitro