Abstract
The unidirectional transport of leucine and aspartic acid by midgut epithelium cells of the tobacco ornworm, Manduca sexta, was investigated using brush border membrane vesicles. Both K+-stimulated and K+-insensitive transport pathways for these two amino acids were identified. Kinetic analyses and profiles of cis-inhibition by other amino acids demonstrated that leucine and aspartic acid are transported by separate pathways and exhibit different sensitivity to potassium ion.
Original language | English |
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Pages (from-to) | 959-966 |
Number of pages | 8 |
Journal | Insect Biochemistry and Molecular Biology |
Volume | 23 |
Issue number | 8 |
DOIs | |
State | Published - Dec 1993 |
Externally published | Yes |
Bibliographical note
Funding Information:Several pathways that transport different amino acids, such as phenylalanine, histidine, glutamic acid, lysine and alanine, have been described in midgut brush border membrane vesicles (BBMV) from Pieris brassicae *This research was supported by USDA Competitive Research Grant No. 88-37153-4098 to P. E. Dunn. This is journal paper No. 12641 from the Indiana Agricultural Experiment Station. tDepartment of Entomology,1 158 EntomologyH all, Purdue Univer-sity, West Lafayette,I N 47907-1158, U.S.A. :~Author for correspondence.
Keywords
- Amino acid transport
- Brush border membrane vesicle
- Manduca sexta
- Midgut epithelium
ASJC Scopus subject areas
- Biochemistry
- Molecular Biology
- Insect Science