Germ CellsNeoplasms, Germ Cell and EmbryonalMusclesMuscle, SmoothMuscle ProteinsMyocytes, Smooth MuscleTestisMuscle, SkeletalSpermatogenesisMuscle Fibers, SkeletalTesticular NeoplasmsMuscle ContractionMuscle DevelopmentMuscle, Smooth, VascularMuscle CellsCells, CulturedGerminomaSpermatozoaSertoli CellsSeminiferous TubulesSpermatogoniaSpermatocytesSpermatidsGonadsSeminomaMuscle Fibers, Fast-TwitchRNA, MessengerMuscle DenervationMuscle FatigueAortaMuscle Fibers, Slow-TwitchCell DifferentiationMitochondria, MuscleGene Expression Regulation, DevelopmentalMeiosisImmunohistochemistryMuscle RelaxationRats, Sprague-DawleyMuscle, StriatedNeck MusclesOculomotor MusclesWheat Germ AgglutininsMuscle SpindlesMolecular Sequence DataSignal TransductionSeminiferous EpitheliumCalciumTime FactorsOogenesisDysgerminomaRespiratory MusclesOvaryPapillary MusclesRabbitsMuscle WeaknessCell DivisionGerm LayersGene Expression RegulationGametogenesisTeratomaEndodermal Sinus TumorCell MovementQuadriceps MuscleAbdominal MusclesBase SequenceOogoniaGene ExpressionMice, Inbred C57BLReverse Transcriptase Polymerase Chain ReactionMasseter MuscleIsometric ContractionActinsFacial MusclesMasticatory MusclesMuscular AtrophyPlatelet-Derived Growth FactorSex DifferentiationIntercostal MusclesCell ProliferationBlotting, WesternIn Situ HybridizationMice, KnockoutSatellite Cells, Skeletal MuscleAorta, ThoracicElectromyographyRats, WistarNuclear Receptor Subfamily 6, Group A, Member 1ApoptosisAmino Acid SequenceMyoblastsMice, TransgenicCell LineTranscription FactorsMuscular DiseasesPhenotypeTooth GermMyosin Heavy ChainsPectoralis MusclesMyofibrilsDose-Response Relationship, Drug