As seen with the electron microscope, the synaptonemal complex is formed by two "lateral elements", mainly formed by SYCP3 and secondarily by SYCP2, a "central element" that contains at least two additional proteins and the amino terminal region of SYCP1, and a "central region" spanned between the two lateral elements, that contains the "transverse filaments" composed mainly by the protein SYCP1.
Visto con microscopio electrónico, o complexo está formado por dous "elementos laterais", principalmente formados por SYCP3 e secundariamente por SYCP2, un "elemento central" que contén polo menos dúas proteínas adicionais e a rexión aminoterminal de SYCP1, e unha "rexión central" que se estende entre os dous elementos laterais, que contén os "filamentos transversos" compostos principalmente por SYCP1.