Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

Input: Consider Input: Polycomb gene silencing requires histone methyltransferase activity of Polycomb repressive complex 2 (PRC2), which methylates lysine 27 of histone H3. Information on how PRC2 works is limited by lack of structural data on the catalytic subunit, Enhancer of zeste (E(Z)), and the paucity of E(z) mutant alleles that alter its SET domain. Here we analyze missense alleles of Drosophila E(z), selected for molecular study because of their dominant genetic effects. Four missense alleles identify key E(Z) SET domain residues, and a fifth is located in the adjacent CXC domain. Analysis of mutant PRC2 complexes in vitro, and H3-K27 methylation in vivo, shows that each SET domain mutation disrupts PRC2 histone methyltransferase. Based on known SET domain structures, the mutations likely affect either the lysine-substrate binding pocket, the binding site for the adenosylmethionine methyl donor, or a critical tyrosine predicted to interact with the substrate lysine epsilon-amino group. In contrast, the CXC mutant retains catalytic activity, Lys-27 specificity, and trimethylation capacity. Deletion analysis also reveals a functional requirement for a conserved E(Z) domain N-terminal to CXC and SET. These results identify critical SET domain residues needed for PRC2 enzyme function, and they also emphasize functional inputs from outside the SET domain.

Output: What is the characteristic domain of histone methyltransferases?


Input: Consider Input: Hoping to rebound from their three-game losing streak, the Raiders flew to Dolphin Stadium for a Week 11 duel with the Miami Dolphins. In the first quarter, Oakland trailed early as Dolphins WR Ted Ginn, Jr. got a 40-yard TD run. In the second quarter, the Raiders responded with kicker Sebastian Janikowski getting a 21-yard field goal. In the third quarter, Oakland started to catch up as DE Jay Richardson sacked QB Chad Pennington in his own endzone for a safety. Miami would answer with RB Patrick Cobbs getting a 10-yard TD run. In the fourth quarter, the Raiders took the lead as Janikowski got a 37-yard field goal, along with WR Johnnie Lee Higgins returning a punt 93 yards for a touchdown. However, the Dolphins sealed Oakland's fate as kicker Dan Carpenter nailed a 38-yard field goal.

Output: Which player scored a safety?


Input: Consider Input: The management of pain associated with chronic musculoskeletal conditions represents a significant challenge for the clinician. There remains a need for novel medications that have a significant analgesic benefit and are also safe and well tolerated. Both pre-clinical and clinical data have provided evidence of the role of nerve growth factor (NGF) in a multitude of pain eliciting conditions. Therefore, the development of monoclonal antibodies to NGF for chronic painful musculoskeletal conditions has generated interest. Areas covered: This manuscript is a review that examines both the pharmacological properties and clinical studies of tanezumab, the most widely studied antibody to NGF, for management of osteoarthritis (OA) and low back pain. In addition, the safety and tolerability profile and development history of tanezumab are also discussed. Expert opinion: Most studies provide strong support for the ability of tanezumab to provide clinically meaningful pain relief in individuals with these conditions, with longer-term studies suggesting durability of effect. The adverse event profile appears favorable, assuming the risk mitigation strategies are effective at reducing the incidence of joint-related side effects. Further data are being collected to define the optimal dose and dosing strategy in both OA and chronic low back pain.


Output: What is the target of tanezumab?