Abstract: Disclosed herein is a basketball backboard system and methods of assembly. The backboard system reduces and simplifies the number of steps for a user to take in assembling the system for play. The basketball system comprises a base, a vertical support assembly including a pole, a backboard extension arm, a backboard, and a rim. In some embodiments, the user only has to complete five attachments to fully assemble the system, including securing the vertical support assembly to the base, securing the backboard extension arm to the pole, mounting the backboard to the extension arm, and mounting the rim to the backboard. It is further contemplated that the system will be convenient to package, as the vertical support assembly may be designed to fully nest within the base to reduce product volume.

Abstract: A registration system for repeatably beginning modulation of a scanning laser beam at a selected initial location on a rotatable drum through initiating a rotation of the drum from a known starting position in synchronism with the laser scan so that the initial location is accurately brought under the laser beam as modulation begins.

Abstract: This invention concerns an isolated DNA sequence encoding human terminal xynucleotidyl transferase as well as vectors and transformed hosts carrying said DNA sequence.