Inferences concerning crossbridges from work on insect muscle.
This paper presents a number of separate results concerning crossbridge attachment: [1] X-ray diffraction from live bumble bee flight muscle shows a set of layer lines distinct from that of relaxed Lethocerus, in which the apparent myosin helix is shorter than that of the actin. [2] Rigor crossbridges of Lethocerus are not rotatable by stretch. [3] Rabbit and Lethocerus fibres in rigor relaxed by ATP at -35 degrees C show evidence of non-rigor crossbridge attachment.
Tregear
R T
RT
AFRC Institute of Animal Physiology, Babraham, Cambridge, UK.
Townes
E
E
Gabriel
J
J
Ellington
C
C
D000818:Animals; D001516:Bees / Q000502:physiology; D007313:Insecta / Q000502:physiology*; D009119:Muscle Contraction / Q000502:physiology; D009126:Muscle Relaxation / Q000502:physiology; D009132:Muscles / Q000737:chemistry* / Q000502:physiology*; D016658:Psoas Muscles / Q000737:chemistry / Q000502:physiology; D011817:Rabbits; D013696:Temperature; D014961:X-Ray Diffraction