Hold the "fn" key and hit your right arrow key to advance to the end of you sequence. Hold the "fn" key and hit your left arrow key to advance to the start of your sequence.
Another option would be to use the open up your Keyboard Shortcuts and make your own short cut that suits your needs. You can even create different custom shortcut settings for different keyboards depending on your needs and switch between them.
You can also define your own shortcut. Go to Preferences -> Keyboard Shortcuts. Type "go to sequence-clip start" in the search field under the left side of the on-screen keyboard. Then click to the right of it in the "Shortcut" column and press the key you want to make a shortcut for it.