Your Query returns 14 Accession Numbers:
Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
P38bNM_01116110090Sapk2    p38-2    Prkm11    Sapk2b    p38beta    p38beta2    Mapk11   
P38BBC0279339606PRKM11    P38BETA2    SAPK2B    SAPK2    p38-2    p38Beta    MAPK11   
P38BNM_0027519606SAPK2    p38-2    PRKM11    SAPK2B    p38Beta    P38BETA2    MAPK11   
P38BNM_1389939606SAPK2    p38-2    PRKM11    SAPK2B    p38Beta    P38BETA2    MAPK11   
P38bBC05721110090Sapk2    p38-2    Sapk2b    p38beta    p38beta2    Mapk11   
P38bBC06473710090Sapk2    p38-2    Sapk2b    p38beta    p38beta2    Mapk11   
p38bNM_1782237955zp38b    MAPK14    mapk14b   
p38BNM_0580137227p38    Dp38    D-p38    186F5S    CG7393    D-p38b    Mpk34C    anon-sts23   
p38BNT_0337797227p38    Dp38    D-p38    186F5S    CG7393    D-p38b    Mpk34C    anon-sts23   
p38bAY0585487227
p38bAE0034067227
p38bAE0034077227
p38bNG_0006977227p38    186F5S    CG7393    D-p38b    Mpk34C    CT22735    p38 MAPK    anon-sts23    ESTS:186F5S    BG:DS00797.3    stress-activated p38b MAP kinase   
p38bAE0036417227

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* OMIM link based on symbol match for human and mouse.

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Text2Knowledge ... Yong Huang 2002