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If you’ve made it this far, you’re well on your way to becoming a GIMP plug-in writer—and if you choose, perhaps a developer for the GIMP itself.

You can develop your plug-in authoring skills by exploring the existing scripts and plug-ins, reading the documentation available on the GIMP website, and writing your own new plug-ins. Whether you’re tweaking existing scripts, writing quick scripts for your own use, or developing polished plug-ins intended for distribution, don’t be afraid to explore and try new things!

More than any other part of the GIMP, plug-in writing benefits from good documentation. This book isn’t intended to be a complete reference manual on GIMP programming; it only scratches the surface. You’ll want to become very familiar with the online documentation and existing tutorials.

If you’re wondering where to find all these web resources, keep reading. Chapter 12 will discuss the wealth of GIMP information on the web, as well as a few other topics such as GIMP’s configuration files, screen shots, and printing.

In conclusion, the last 25 years of research has identified the basis for the “switch-off” effect at the molecular level, including the enzymes catalyzing the reversible ADP-ribosylation of dinitrogenase reductase in . However, the components of the signal transduction to DRAT and DRAG have not been identified. The recent demonstration of the role of P proteins in this pathway is, however, most likely an important contribution to future studies. It is not surprising that P proteins are involved in the signaling of the nitrogen status, but it will be crucial to show whether or not there is a direct effect of these proteins in “switch-off” by darkness. The regulatory system, which controls nitrogenase activity in and other diazotrophs, has already shown a number of new features concerning enzyme control in response to metabolic changes that are important for understanding metabolic regulation in general. Some of the possible components that have been suggested, like the role of GTP and GTP hydrolysis, may, if confirmed, add further complexity to the control cascade.