Friendship jealousy and interaction needs: how mutual friend features affect users of WeChat Moments.

Many social networking services (SNSs) have features that highlight the common friends of pairs of users. Previous research has examined recommendation systems that use mutual friend metrics, but few scholars have studied how the existence of features related to mutual friends affects users in SNSs. To explore this issue further, we conducted interviews with 22 users of WeChat Moments to investigate how certain rules involving mutual friends affect users and how they deal with the issues that arise due to these rules.

[Construction of mic2/CD99 gene vector and its transfection in Hodgkin lymphoma L428 cell line].

Objective: To construct a eukaryotic expression vector of CD99 gene for transfection into Hodgkin lymphoma L428 cells.

Methods: The full-length cDNA of CD99 gene was amplified from Jurkat cells by RT-PCR and cloned into the pcDNA3.1(+) vector and transfected into L428 cell line using Lipofextamine 2000.