منابع مشابه
Mammary gland secretion: hormonal coordination of endocytosis and exocytosis.
The mammary epithelium coordinates the uptake of milk precursors and the transport of milk components in order to produce milk of relatively constant composition at a particular stage of lactation, as long as the mammary gland is healthy. The mammary epithelial cell controls the uptake of blood-borne molecules at its basal side and the release of products into milk at its apical side, through m...
متن کاملType V protein secretion: simplicity gone awry?
Since its discovery in the late 1980's, the family of secreted proteins termed the autotransporters has been expanding continuously to become the largest group of secreted proteins in Gram-negative bacteria. The type V secretion pathway, which includes the autotransporters (type Va) together with the two-partner secretion system (type Vb) and the Oca family (type Vc), can be defined by secreted...
متن کاملMammary tumor regression. V. Role of acid ribonuclease and cathepsin.
Studies have been made on the role of two hydrolases, acid RNase and cathepsin, in the regression of hormone-dependent rat mammary carcinomas. A burst of acid RNase activity as early as 6 hours after hormonal deprivation was followed by a significant increase in cathepsin activity that began 48 hours after hormone removal. The ratios of free to bound activities of these enzymes increased with t...
متن کاملStudies in Milk Secretion. V. on the Variations and Correlations of Milk Secretion with Age.
TABLE O F CONTENTS INTRODUCTION ................................................................ I I I Material and methods ........................................................ 112 Variation of Jersey milk production with age at commencement of test.. ........ I14 Analytical constants describing the variation of milk production at different ages.. 119 The correlation of Jersey 8-months milk...
متن کاملType V protein secretion pathway: the autotransporter story.
Gram-negative bacteria possess an outer membrane layer which constrains uptake and secretion of solutes and polypeptides. To overcome this barrier, bacteria have developed several systems for protein secretion. The type V secretion pathway encompasses the autotransporter proteins, the two-partner secretion system, and the recently described type Vc or AT-2 family of proteins. Since its discover...
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ژورنال
عنوان ژورنال: Biochemical Journal
سال: 1924
ISSN: 0306-3283
DOI: 10.1042/bj0180785