BIO 311C Lecture Notes - Lecture 5: Signal Transduction, Mating Of Yeast, Cell Junction

• School: UT-Austin
• Department: Biology
• Course: BIO 311C
• Professor: D Hansen

Document Summary

+ - present in amino acids, proteins and nucleic acids: sulfhydryl sh most reactive, present in proteins, phosphate po4, methyl ch3 present in lipids, proteins and nucleic acids. 2- - present in phospholipids and nucleic acids. Yeast cells mating: exchange of mating factors, secrete a factor and alpha factor, which are recognized by the other cell, the cells move closer to each other, which leads to mating and creating a/alpha cell. Direct contact signaling: cell junction, simple diffusion signals pass through the cytoplasm, animal cells can communicate through gap junctions, plant cells through plasmodesmata, cell cell recognition, binding causes the signal to be transmitted. Long-distance signaling: animal endocrine system uses hormones, endocrine cell releases hormones into blood and they then travel to a specific target cell, plants also use hormones, ethylene is produced during fruit ripening and in turn causes more ripening.