In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.

Input: Consider Input:  Although polyubiquitin chains linked through Lys ( 29 ) of ubiquitin have been implicated in the targeting of certain substrates to proteasomes , the signaling properties of these chains are poorly understood .

Output: polyubiquitin chains


Input: Consider Input:  Differential transcription of plastome - encoded genes in the mesophyll and bundle - sheath chloroplasts of the monocotyledonous NADP - malic enzyme - type C4 plants maize and Sorghum .

Output: malic enzyme


Input: Consider Input:  To understand this dramatic effect , we examined the localization of SR proteins and found that SC35 was shifted to the cytoplasm in sky1Delta yeast , although this phenomenon was not obvious with ASF / SF2 , indicating that nuclear import of SR proteins may be differentially regulated by phosphorylation .


Output: SR proteins