I know that the first movement of a string quartet is supposed to be sonata form but I am having trouble making any sense of it. So I am going to throw out what I see and let you fillet me....
It starts out in Em with a small intro at the begining. Theme 1 starts in m.3 and lasts till m.33. There is a transition from the end of m.33 to m.35. Theme 2 begins in m.36 and ends in m37. There is a coda from m.58- the double bars.
This begins the exposition where I see him playing with some of the same rythmic and melodic lines from the exposition. The retransition begins in 135 with all of the trills.
The recap begins in m.145 in AM. It looks different from the one in the exposition and I can't figure out what exactly is going on untill i see the begining of theme 2 in m.73. The codetta goes from m199 to the double bars. From then on is the coda where it ends nicely in Em.