Fruit tree patches are Farming patches used to grow fruit-bearing trees. Growing fruit trees are somewhat different to other plants, in that there is an intermediate growing stage where the seed must be grown into a sapling before being planted into a cleared fruit tree patch. We plant papaya trees in two places (A and B), with different environments. After 6 months the saplings were evaluated in their health condition, using a discrete numerical index, from 1 (healthy) to 5 (dead). Test if there is a difference in health status between the two sites, using the U-Mann-Whitney test Table 2.
Crystal structure of papaya glutaminyl cyclase, an archetype for plant and bacterial glutaminyl cyclases.
Wintjens, R., Belrhali, H., Clantin, B., Azarkan, M., Bompard, C., Baeyens-Volant, D., Looze, Y., Villeret, V.(2006) J Mol Biol 357: 457-470
- PubMed: 16438985Search on PubMed
- DOI: 10.1016/j.jmb.2005.12.029
- Primary Citation of Related Structures:
2FAW - PubMed Abstract:
- crystallization and preliminary X-ray diffraction studies of the glutaminyl cyclase from carica papaya latex
Azarkan, M., Clantin, C., Bompard, C., Belrhali, H., Baeyens-Volant, D., Looze, Y., Villeret, V.
(2005) Acta Crystallogr Sect F Struct Biol Cryst Commun F61: 59
Glutaminyl cyclases (QCs) (EC 2.3.2.5) catalyze the intramolecular cyclization of protein N-terminal glutamine residues into pyroglutamic acid with the concomitant liberation of ammonia. QCs may be classified in two groups containing, respectively, the mammalian enzymes, and the enzymes from plants, bacteria, and parasites ...
Glutaminyl cyclases (QCs) (EC 2.3.2.5) catalyze the intramolecular cyclization of protein N-terminal glutamine residues into pyroglutamic acid with the concomitant liberation of ammonia. QCs may be classified in two groups containing, respectively, the mammalian enzymes, and the enzymes from plants, bacteria, and parasites. The crystal structure of the QC from the latex of Carica papaya (PQC) has been determined at 1.7A resolution. The structure was solved by the single wavelength anomalous diffraction technique using sulfur and zinc as anomalous scatterers. The enzyme folds into a five-bladed beta-propeller, with two additional alpha-helices and one beta hairpin. The propeller closure is achieved via an original molecular velcro, which links the last two blades into a large eight stranded beta-sheet. The zinc ion present in the PQC is bound via an octahedral coordination into an elongated cavity located along the pseudo 5-fold axis of the beta-propeller fold. This zinc ion presumably plays a structural role and may contribute to the exceptional stability of PQC, along with an extended hydrophobic packing, the absence of long loops, the three-joint molecular velcro and the overall folding itself. Multiple sequence alignments combined with structural analyses have allowed us to tentatively locate the active site, which is filled in the crystal structure either by a Tris molecule or an acetate ion. These analyses are further supported by the experimental evidence that Tris is a competitive inhibitor of PQC. The active site is located at the C-terminal entrance of the PQC central tunnel. W83, W110, W169, Q24, E69, N155, K225, F22 and F67 are highly conserved residues in the C-terminal entrance, and their putative role in catalysis is discussed. The PQC structure is representative of the plants, bacterial and parasite enzymes and contrasts with that of mammalian enzymes, that may possibly share a conserved scaffold of the bacterial aminopeptidase.
Related Citations:Laboratoire de Chimie Générale, Institut de Pharmacie-U.L.B. CP 206/04, Boulevard du Triomphe, B-1050 Brussels, Belgium.
Email and instant messaging tools provide an easy way to send files, such as pictures, to others, but when it involves large files, problems can arise. It is immensely frustrating to start the transfer of a multi megabyte files only to find that a network timeout or other similar problem occurs towards the end of the transfer.
Papaya is a file sharing tools that makes it easy to share files of virtually any size with others on the same network as you, or over the internet. All you need to do is drag and drop the files you want to share onto the program window and you will be provided with an address that others can connect to in order to download the files.
Papaya 13 Word Cookies
Security can be put in place by requiring a username and password for downloading, and an HTTPS connection can also be used. You have the option of placing a limit on data transfer rates to prevent saturation of your internet connection or to balance transfer rates between several downloaders.
The program also avoids help to speed up the process of getting files to others as files are hosted on your computer and do not need to be uploaded to a storage sites in advance. The trial version of Papaya is limited to 50 downloads or 1GB of data transfer, whichever comes first, and this should be enough for you to see the benefits of the program.
Verdict:
Papaya 13
Sharing large files is made incredibly simple with Papaya and it is a great alternative to some of the more complicated options such as setting up an FTP server.